CADDIS FLY LARVAE—FLINT 467 
filaments. Abdomen tapering gradually from the second or third 
segment; segmentation distinct. Anal prolegs well developed and 
extending beyond the tenth segment of the abdomen. 
Key to larval forms 
1. Anal proleg with an apicolateral spur (fig. 1,5). . 2 
Anal proleg without such a spur (fig. 2,5) . : 6 
2(1). Apicolateral spur of proleg short and sharply decurved (ig 6 aT 3 
Spur long and evenly curved (fig. 1,5) . SRE Aer 4 
3(2). Body segments with alternating dark and light Bande . .. . . melita 
Body segments not contrastingly banded. . .. . . . . amicis 
4(2). Frontoclypeus with dark transverse bands anterior and posteriorly 
Gigslvc)igy Sick: ott c= aoe We OR be ols se ane eta 
Frontoclypeus without bands A Ny Mee eye he Mol Peg hem one cia 5 
5(4). Head uniformly colored (fig. 4,c) . . . - 8 2 trata 
Head with a dark transverse band posteriorls) (fig. 6 ‘o) 
(angelita?) species 1 
Gchye Abdomen bearing gills® 5. 4 os 2 a sa 2 = ss = s = « acropedes 
Abdomen without gills... . ate. Ce RO 7 
7(6). Anal prolegs with a basoventral hooks (fig. 2 ay mg idvades | cMT ahh: Cates 8 
Anal prolegs without a free basoventral hook .......... Ii 
8(7). Anal claw without ventral teeth (fig. 5,d) .........4.. 9 
Anal claw with ventral teeth (fig. 2,b) .. . . faa lt) 
9(8). Head equal in length and width; pronotum Sabin 6-8 dark anterolateral 
setae in addition to corner setae (fig. 5a)... . . . minora 
Head slightly longer than wide; pronotum with 1- 2 dark anterolateral 
setae in addition to corner setae (fig. 5,c) . . . . . Manistee 
10(8). Frontoclypeus with a distinct dark V Rostorioniay (fig. 2,c); mandibles 
edentate (fig. 2,a)... . . torva 
Frontoclypeus without aauinct V (fg. 3,4); Gaandibles tootned apically 
(igs UO) ans. ... . . lobifera 
11(7). Second segment of eieeillary palpus Pibedtal £0 first . . . glaberrima 
Second segment of maxillary palpus longer than first. ...... 12 
12(11). Anal claw without ventral teeth (fig. 11,d), carolina group. . . . . 13 
Anal claw with ventral teeth (fig. 8,6), znvaria group. . ..... 415 
13(12). Head with a distinct pattern of infuscations and muscle scars (fig. 10,6). 
fenestra and ledra 
Head nearly concolorous . . . ca ale! 
14(13). Head slightly darker mor teriony Gls, i a (ieieaneas) aie Oklahoma). 
kiamichi 
Head uniformly golden brown (fig. 11,c) (Appalachian region). 
(carolina?) species 5 
15(12). Head and pronotum nearly black with a conspicuous pattern of pale 
muscle scars and spots (fig. 9,b). . . . . . . (carpenteri?) species 2 
Head not marked as above... . Sue ee one cu) aG 
16(15). Head narrowed on posterior half, reiowich (fig. 10 ay 
(banksi?) species 3 
Head either widening posteriorly or parallel sided... ..... I7 
17(16). Head nearly parallel sided, either uniformly blackish or golden brown; 
pronotum slightly darker on anterior fourth (fig. 9,a) . . . . nigrita 
Head distinctly widening posteriorly, often with an indistinct pattern; 
pronotum often with a central dark spot (fig. 8,2) ....... 18 
