354 MISC. PUBLICATION 657, U. S. DEPT. OF AGRICULTURE 
KEY TO LEPIDOPTEROUS LARVAE—Continued 
Nak Webworms and tent makers—Continued 
Cherry (wild and choke)—gregarious; yellow with black 
head; in dense web in which they feed, enlarging it when 
necessary. May—July 
Archips cerastvorana (Fitch), p. 477. 
Elder (Sambucus)—between leaves webbed together; light 
green; sparsely hairy; 2 white stripes on dorsum. Full- 
grown larva pinkish to dull white. June—September 
Phlyctaenia tertialis (Guen.), p. 445. 
Juniper—gregarious; brown and black; feeding in web; 
April-June; September 
Dichomeris marginella (F.), p. 460. 
Juniper (common)—gregarious; brownish yellow; head and 
shield darker; in webs. May—June 
Phalonia rutilana (Hbn.), p. 485. 
Maple (sugar)—gregarious; brown, yellow and black striped; 
in small nest of leaves webbed together. July—September 
Tetralopha sp., p. 446. 
Oak—gregarious; gray green; head and shield black; in nest 
of densely webbed leaves, common on scrub oak. May— 
Jilly etait ae eee Archips fervidana (Clem.), p. 478. 
Oak—gregarious; brown and yellow striped; spiracles and 
legs black; in nest of leaves. July—October 
Tetralopha asperatella (Clem.), p. 447. 
Pine—gregarious; yellowish brown with darker stripes; in 
silken tubes in globular masses of excrement and silk. 
August—October_ ______ Tetralopha robustella Zell., p. 446. 
Povlar—gregarious; dark brown with yellowish lines; head 
black; at rest in nest of leaves drawn together and lined 
with silk. May—October_Ichthyura inclusa Hbn., p. 396. 
Poplar—gregarious; brown and yellow striped; spiracles and 
legs black; length *4 inch; in nest of leaves. July—October 
Tetralopha sp. near asperatella Clem., p. 447 
2 Geary ce Sie UK ese a a eer 
1% Sluglike, densely hairy (puss caterpillars) __ Megalopygidae, p. 442. 
Sluglike, of various forms; smooth or armed with spines 
Limacodidae, p. 439. 
14. Typical caterpillars: 
Body distinctly clothed with hairs or bristles____________-_ 
Each segment of body prominently armed with a transverse 
row jofsbranchedsspines = © ae yen ee ee 
Body naked or sparsely hairy, bearing prominent horny or 
wartlike tubercles or spines on some of the segments, 
usually, uneveniny sizerand shapes ee 
Body naked, abdomen unarmed except for the eighth abdominal 
segment which bears a prominent horn or eyelike tubercle _ 
Body naked, but bearing long fleshy filaments____________ 
Body naked, abdominal segments with one or more promi- 
nent dorsal humps, Notodontidae (Schzzura and others), 
Phalaenidae CAcromictinac) = a5 s— eee 
Body naked, and having 2 anal projections or ending in a 
pair of stemapoda or modified filamentous anal legs. 
Some species have the head armed with antlers_-______ 
Body naked, usually slender, abdominal legs except those 
on the sixth and tenth segments more or less rudimentary or 
obsolete; when walking body forms a loop_______-_-_-- 
Body naked, without prominent tubercles or filaments on 
dorsum; some species of Phalaenidae, Notodontidae, 
Agaristid ae, sands Ob Meise se pease eee openers oes 
Ds Hairy; gregarious; when disturbed have a habit of raising head and 
anal end in an upright position, clinging to twig or branch with 
their middle prolegs; usually strip one branch before migrating 
to another; full-grown caterpillars 2 inches in length. July— 
13 
14 
30 
31 
32 
33 
16 
17 
