Diceroprocta pronotolinea Sanborn 2007, sp.n.

Diceroprocta pronotolinea sp.n.

(figs. 21–29)

Type material.— Holotype male: “ Valerio, Trujano, GRO, 21–VI–64, J. Ramos Elorduy de Conconi ” (UNAM). Paratypes: 2 males same data (1 UNAM, 1 AFSC), female “ MEXICO: Guerrero, Hwy 95 5.5 km N Rio Mezcala, 16.VII.1992, T.C. MacRae” (AFSC), female same data except 17.VII.1992 (FSCA), female same data except 7.VII.1992 (AFSC).

Etymology. The species is named for the black stripe along the dorsal midline of the pronotum.

Description.

Coloration.—Ground color of head, mesothorax and abdomen piceous, of prothorax castaneous (fig. 21). Head (figs. 22, 23).—Head wider than mesonotum. Piceous except for small fuscus spot between lateral ocellus and eye on vertex and lateral to curve of frontoclypeal suture. Fine silver pile posterior to eye. Postclypeus with green triangle along frontoclypeal suture. Transverse ridges and lateral border of postclypeus tawny. Postclypeus with posterior five transverse lines and transverse ridges fuscus laterally. Paratypes range from completely fuscus, to fuscus with piceous along midline or piceous extending onto trantansverse ridges and grooves as seen in holotype. Fine white pile within transverse grooves, thicker medially. Anteclypeus piceous with white pubescence. Anteclypeus fuscus edged with piceous or with a fuscus spot posterior to junction with postclyeus in paratypes. Rostrum fuscus becoming darker distally to piceous tip reaching hind leg coxae. Lorum and gena piceous except transverse fuscus stripe on gena along junction with lorum to base of coxa, covered with long pile and white pubescence. Antennae piceous.

Thorax (figs. 22, 23).—Pronotum castaneous with piceous midline stripe. Midline stripe most narrow at medial terminus of paramedical fissure expanding laterally to level of lateral ocellus and posterior border of eye and continues to curve laterally to anterior border at medial border of fuscus spot of vertex. Midline with thin castaneous line within piceous stripe in some paratypes. Additional fuscus spots on lateral angle and anterior lateral margin of pronotal collar. Spots variable in size in paratypes, connected by lateral piceous margin in one paratype. Piceous marking in anterior portion of lateral fissure in some paratypes. Mesonotum piceous, parapsidal suture outlined in castaneous. Diffuse castaneous region around scutal depression extending onto anterior arm of cruciform elevation. Castaneous region may extend to parapsidal suture in some paratypes. Scutal depression piceous. Anterior arms of cruciform elevation and wing grooves castaneous. Midline of cruciform elevation piceous. Cruciform elevation coloration ranges from completely piceous to all arms marked dorsally with castaneous in paratypes. Fine silvery pile on posterior border and sparingly on dorsal surface. Ventral surface covered with thick, white pubescence.

Legs.—Castaneous lightly marked with fuscus. Coxae striped with fuscus and covered with white pubescence. Trochanters lightly striped with fuscus. Femora striped with fuscus. Fore femora primary spine oblique, secondary spine larger and upright, both spines piceous. Tibiae, tarsals and claws dark castaneous marked with fuscus.

Tegmina and wings (fig. 21).—Hyaline. Tegmina with eight apical cells. Venation of tegmina and wings castaneous, turning darker brown distally. Radius and subcostal vein fuscus to node in right wing of holotype and in paratypes. Basal cell clouded in proximal third and along radius and subcostal vein and arculus. Proximal portion of cubitus posterior + anal vein 1 and entire length of anal vein 2 + 3 fuscus. Slight infuscation on basal veins second and third apical cells. Wings with six apical cells. Venation of wings castaneous except for fuscus anal vein 3. Anal vein 2 also fuscus in some paratypes. Plaga and margins along anal veins 2 and 3 grayish. Gray area of anal cell 2 margined internally with fuscus.

Operculum (figs. 24, 25).—Male operculum tawny, dusted with white pubescence with anterior lateral border and posterior border edged in fuscus. Fuscus border absent in some paratypes and also on medial border in other paratypes. Roughly triangular in shape, reaching posterior border of sternite II and almost meeting along midline. Lateral border sinuate. Meracanthus tawny with a fuscus base, marked centrally with fuscus in one paratype. Female operculum similarly colored, more truncate with curved posterior border.

Abdomen (figs. 21).—Dorsal abdomen piceous covered with fine silvery pile particularly medially on tergite 1, Castaneous shading on lateral portions of tergites 2 and timbal cover, decreasing in proportion on tergites 3 and 4 and again on lateral half of tergite 8. Timbal cover complete. Abdomen ventrally tawny except fuscus sternites I and II. Sternites III–VII marked with transverse dark castaneous mark expanding in size in posterior segments. Transverse coloration piceous in one paratype. Posterior half of sternite VII piceous in male. Sternite VII in female piceous centrally, one paratype with additional lateral piceous spot. Female sternite VII with small, medial V-shaped notch. Sternite VIII piceous in male.

Male genitalia (figs. 26, 27).—Pygofer castaneous, piceous medially and posteriorly. Distal shoulder rounded to a dorsal point which is angled slightly laterally. Dorsal beak absent. Uncus rectangular with medial lobe arched dorsally and lateral lobes curved ventrally forming an approximate right angle. Lateral uncus lobes decrease lateral expansion posteriorly becoming points at terminus. Uncus lobes form ovoid opening in terminus for extension of aedeagus.

Female genitalia (figs. 28, 29).—Tergite 9 fuscus marked with castaneous laterally with ochraceous stripe along medial ventral border and ochraceous spot on postero-lateral portion of tergite 9. Gonocoxite IX piceous. Ovipositor and ovipositor sheath about two times length of dorsal beak. Ovipositor sheath and ventral tergite 9 with sparse long pile.

Measurements (in mm).— Males (n=3), mean (with range) given for available specimens. Length of body: 14.27 (13.04–15.08); length of fore wing: 18.70 (17.40–20.26); width of fore wing: 5.98 (5.52–6.62); length of head: 2.61 (2.40–2.74); width of head including eyes: 5.61 (5.26–6.08); width of pronotum including suprahumeral plates: 4.65 (4.10–5.26); width of mesonotum: 4.40 (3.90–5.00). Females (n=3), mean (with range) given for available specimens. Length of body: 15.77 (15.26–16.50); length of fore wing: 20.11 (19.30–21.34); width of fore wing: 6.18 (5.80–6.80); length of head: 2.63 (2.56–2.74); width of head including eyes: 6.07 (5.92–6.30); width of pronotum including suprahumeral plates: 5.27 (5.00–5.58); width of mesonotum: 4.91 (4.82–5.00).

Notes.— This species is similar in size to D. pusilla Davis. Diceroprocta pronotolinea can be easily differentiated by the fuscus stripe on the castaneous pronotum and lack of infuscation on the tegmina. All other Diceroprocta species in Mexico are much larger species.