Two new species of Platydoryctes Barbalho and Penteado-Dias, 2000 (Hymenoptera: Braconidae: Doryctinae) from Brazil, with an identification key for species

Platydoryctes Barbalho and Penteado-Dias 2000 is a small genus of Neotropical parasitoid wasps (Hymenoptera: Braconidae: Doryctinae) with four described species to date. Two new species of the genus are described from Brazil, and a key to species is presented in this paper.

Here, with the aim of improving our knowledge about the group, we described two new species of Platydoryctes from Brazil: Platydoryctes corumba Castro and Penteado-Dias sp. nov. (Mato Grosso do Sul State, Brazilian midwest), and Platydoryctes mossoro Castro and Penteado-Dias sp. nov. (Rio Grande do Norte State, Brazilian northeast).
The specimens were collected in Corumbá, Mato Grosso do Sul state, using light and Malaise traps. The genus was identified using Marsh (2002) and for species we used Barbalho and Penteado-Dias (2000)
Head: Head in dorsal view 2.6 times wider than its median length, as wide as width of mesoscutum. Transverse diameter of eye in lateral view 1.4 times longer than temple. Ocelli arranged in an isosceles triangle. POL 2.2 times as long as Od, 0.9 times to OOL. Eyes, 1.3 times as high as width. Height of malar space around 0.3 times height of eye. Malar suture absent. Hypoclypeal depression rounded, as long as wide. Occipital carina complete, ventrally joined with hypostomal carina. Antenna with 22 antennomeres. Scape 1.8 times longer than its maximum width, first flagellar segment straight, 5.0 times longer than apical width, 1.2 times longer than second segment.
Mesosoma: Length of mesosoma 4.5 times its height. Pronotum with medial pronotal groove. Notauli present anteriorly. Pre-scutellar depression in dorsal view deep, with eight carinae clearly defined, about 0.2 times as long as scutellum. Scutellum flattened.
Wings: fore wing 4.1 times longer than its maximum width. Pterostigma 3.3 times longer than wide. Vein r arising before of the middle of pterostigma. Marginal cell long, its length 2.8 times maximum width. Vein R1 1.3 times longer than pterostigma. Vein r as long as maximum width of pterostigma. Vein 3RSa straight; 1.8 times longer than vein r; 0.9 times as long as vein 2RS. Vein 2RS 1.5 times longer than vein r; 3.4 times longer than vein m-cu. Vein m-cu in line with vein 2RS. Vein (RS+M)a slightly curved. First discal cell 0.5 times as long as wide. Veins 1M parallel to m-cu. Vein 1M 5.0 times longer than vein m-cu. Vein cu-a straight, post-furcal with vein 1M. Vein M+CU curved. First subdiscal cell open distally, vein 2cu-a absent. Hind wing 5.8 times longer than wide. Vein SC+R 1.2 times as long as vein C+SC+R. Basal cell narrow, its length 9.7 times maximum width, 0.2 times as long as length of wing. Vein M+CU 2.2 times longer than vein 1M.
Legs: Fore tibia with a row of seven spines arranged more or less in line. Hind coxa 1.5 times longer than its maximum width. Hind tarsus as long as hind tibia. Basitarsus 0.8 times as long as second-fifth tarsal segments combined. Second tarsal segment 0.4 times as long as basitarsus, 1.5 times as long as fifth segment (without pretarsus).
Metasoma: Metasoma as long as head and mesosoma combined. Maximum width of first tergite 1.5 times its minimum width, as long as propodeum. Median length of second tergite 0.7 times as long as its basal width, 1.1 times length of third tergite. Combined length of second and third tergites 0.7 times as long as their maximum width. Ovipositor sheaths 0.3 times as long as metasoma, 0.4 times as long as mesosoma, 0.3 times as long as fore wing, 0.8 times as long as hind tibia.
Head: Head width 1.6 times median length (dorsal view), as long as width of mesoscutum. Transverse diameter of eye 1.7 times longer than temple. Ocelli arranged in an isosceles triangle. POL as long as to Od, 0.5 times to OOL. Eye glabrous, 0.8 times as high. Head as width. Height of malar space around 0.5 times height of eye. Malar suture absent. Hypoclypeal depression rounded, as long as wide. Occipital carina complete, ventrally joined with hypostomal carina. Antenna with 20 antennomeres. Scape 1.7 times longer than its maximum width, first flagellar segment straight, 4.0 times longer than apical width, as long as second segment.
Mesosoma: Length of mesosoma 5.6 times its height. Pronotum with medial pronotal groove. Mesoscutum not declivous anteriorly and on nearly same line of pronotal collar (lateral view); its length (dorsal view) is 1.5 times as long as its maximum width. Notauli absent. Pre-scutellar depression deep, with eight carinae clearly defined, about 0.2 times as long as scutellum. Scutellum flattened. Metapleural lobe large.
Wings: fore wing 4.0 times longer than its maximum width. Pterostigma large, 2.8 times longer than wide. Vein r arising before middle of pterostigma. Marginal cell long, its length 2.7 times maximum width. Vein R1 1.1 times longer than pterostigma. Vein r 0.7 times as long as maximum width of pterostigma. Vein 3RSa straight in its length, 1.5 times longer than vein r, 0.5 times longer than vein 2RS. Vein 2RS 2.7 times longer than vein r, 4.0 times longer than vein m-cu. Vein m-cu in line with vein 2RS. Vein (RS+M)a straight. First discal cell 0.5 times longer than width. Veins 1M parallel to m-cu. Vein 1M 6.3 times longer than vein m-cu. Vein cu-a straight, slightly post-furcal with vein 1M. Vein M+CU slightly curved. First subdiscal cell open distally, vein 2cu-a absent. Hind wing 9.8 times longer than wide. Vein SC+R 1.1 times longer than C+SC+R. Basal cell narrow, its length 8.5 times maximum width, 0.2 times length of wing. Vein M+CU 2.2 times longer than vein 1M. Vein m-cu straight.
Legs: Fore tibia with a row of six spines arranged more or less in a line. Hind coxa without basoventral tubercle, 1.6 times longer than its maximum width. Hind tarsus as long as hind tibia. Basitarsus 0.8 times as long as second-fifth segments combined. Second tarsal segment 0.5 times as long as basitarsus, 2.2 times as long as fifth segment (without pretarsus).
Color: Head yellow, except stemmaticum black. Scape, pedicel and flagellomeres yellow, except five first apical flagellomeres blackish. Mesosoma brownish, except pronotal collar and mesoscutal lobes yellowish, central area of mesoscutum, scutellum and propodeum black; tegula yellow. Legs brown, except all trochanter, trochantellus and tarsi light yellow. Metasoma brownish from darker first tergites to lighter. Ovipositor brown with cutting black and its sheaths black. Biology. Unknown. Etymology. The name of this species refers to the locality where the type specimen was collected.