Leptohyphes Eaton 1882

Key to Leptohyphes Eaton larvae of North and Central America

1a. Dorsal surface of legs densely covered with numerous small, pale depressions (Figs. 18–19, 44–45); submarginal denticles absent (Figs. 20, 46)..................................................................................................................................... 2

1b. Dorsal surface of legs without numerous small, pale depressions (Figs. 22–23, 29–30, 52–53); submarginal denticles present (Figs. 24, 31, 36, 54)...................................................................................................................................... 3

2a. Anterior margin of middle and hind femora with distinct apical concavity (Fig. 43); middle and hind tibiae without elongate inner marginal spines (Fig. 45) ........................................................................................................ murdochi

2b. Middle and hind femora without distinct apical concavity (Fig. 19); middle and hind tibiae with elongate inner marginal spines (Fig. 19) ............................................................................................................................................ alleni

3a. Head, thorax, and legs covered with long hairlike setae (see figs. 37 and 38, Allen 1978).............................. pilosus

3b. Head, thorax, and legs without long hairlike setae..................................................................................................... 4

4a. Sublateral margins of abdominal tergites seven and eight with stout setae (Figs. 32, 55).......................................... 5

4b. Sublateral margins of abdominal tergites without stout setae (Fig. 25).......................................................... apache

5. Body and appendages entirely pale to dark red; abdominal tergites with either no black maculation or limited black maculation confined to lateral margins........................................................................................................ ferruginus

5b. Body and appendages yellow, yellowish-brown, reddish-brown, or gray; abdominal terga with or without sublateral black maculation.......................................................................................................................................................... 6

6a. Vertex of head extensively covered with black maculation/complex markings (Fig. 21); species dark reddish brown with extensive black maculation......................................................................................................................... zalope

6b. Vertex of head without extensive black maculation or complex markings; thin black lines may be present on vertex of head between compound eyes (Figs. 27–2 8, 33); species pale yellow to dark brown.......................................... 7

7a. Operculate gill with basal half black, distal half gray (Fig. 16); two highly fused inner and two highly fused outer marginal denticles of both mandibles (Figs. 37–38).................................................................................. mandibulus

7b. Operculate gill largely yellowish to yellowish-brown to brown; mandibles without highly fused denticles; inner denticles with two to four teeth (Figs. 10–11).................................................................................................................. 8

8a. Body yellow with black maculation on thorax (Fig. 48) and abdomen; middle and hind femora with apical black macula (Fig. 50)................................................................................................................................................ musseri

8b. Body light to dark brown, with very limited black maculation on thorax and abdomen; middle and hind femora without apical black macula (Fig. 53)................................................................................................................................. 9

9a. Thick black line present between compound eyes (Fig. 33); with or without thin black line located at extreme posterior margin of head capsule (Fig. 33); vertex of head without extensive black maculation (Fig. 33)................. lestes

9b- Thick black line absent between compound eyes (Fig. 21); thin black line absent from extreme posterior margin of head capsule (Fig. 21); vertex of head often with extensive black maculation (Fig. 21).................................. sabinas