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MISC. PUBLICATION 657, U. S. DEPT. OF AGRICULTURE 
KEY TO THE LARVAE OF SOME OF THE MORE IMPORTANT SPECIES OF SAWFLIES 
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Lye 
AND HORNTAILS THAT ATTACK TREES AND SHRUBS—Continued 
Head brown; body green with a dorsal stripe of a darker shade. 
Austrian pine and other hard pines. Solitary. July and August 
Acantholyda zappei (Roh.), p. 584. 
Head yellow, dotted with brown above; eyes black; body grayish- 
green, with dorsal, lateral and ventral stripes of purplish-red. 
Red and white pine preferred, but other pines acceptable. May 
and June 2222s eee Acantholyda erythrocephala (L.), p. 583. 
Laryae free feeders: not borers, leaf miners, or inhabitants of buds, 
galls amenis.of willow,.or webbed mests_— == = See 
Larvae borers, leaf miners or inhabitants of buds, galls, aments of 
willow, or webbed: nesis— 22225225 in eee 
Larvae coated with a slimy substance, a white powdery secretion, 
or-<with: whitesflocculent:tutts= == == eee 
Not coatedsas aboves2<22 =. Sei es eee Fee ee eee 
Larvae slimy, sluglike, olive green; on upper surface of leaves of 
cherry, pear, hawthorn, plum, quince, and shadbush. June— 
September. = ss eres Bee Caitroa cerasi (L.), p. 565. 
Body densely covered with a white powdery secretion; Cornus 
spp? July—October:=== =e a= =a] Macremphyius spp., p. 581. 
Body covered with flocculent white tufts. Butternut, black walnut, 
and hickory. July and August 
Blennocampa caryae (Nort.), p. 582. 
Larvae sparsely hairy, bristly, or bearing rows of short spines____ 
Body naked or bearing minute setae scarcely visible to the naked 
Gencth 44 to 4 inchs. 3 a ee ee ee ee ee 
Greenish, with transverse rows of slight tubercles bearing stiff 
setae; lateral lobes distinct. Gregarious. On butternut, hick- 
ory, or oaks. June-August__Species of Acorduleceridae, p. 550. 
Greenish white; clothed with long rather stout bristles. On rose; 
throughout the summer_________ Cladius isomerus Nort., p. 571. 
Body armed with rows of spines, some being V- or Y-shaped. Head 
pale or blackish; body leafgreen or with dorsum grayish. On 
hickory and oak. May and June_______~_ Periclista spp., p. 582. 
Body sparsely clothed with short, white hairs; head black with 
yellow markings; body orange yellow, with 2 rows of black spots 
on each side, the upper row large and more or less rounded. 
Poplar, with Carolina and Lombardy preferred. May—July and 
August—October_______- Trichiocampus viminalis (Fall.), p. 570. 
Body sparsely hairy; head mostly black; body yellow, with a row 
of large black spots on each side beneath which is a row of small- 
er spots, the latter partially coloring the area containing the - 
spiracles. Willow. May—July and August—October 
Trichiocampus irregularis (Dyar), p. 571. 
Body without prominent stripes and the dorsum not heavily 
spotted a..2 5 225 ate Spe a aoe) ee oe 
Body marked with one or more stripes or numerous small spots___ 
Food plant, ash—Head brownish; body yellowish white or greenish 
white. Length about % inch. May and June_____ Tomostethus 
multicinctus Roh., p. 581. 
Ash—Head shiny black; body whitish with a yellowish tinge. May 
ANC June te i es Tethida cordigera (Beauv.), p. 581. 
Birch—Head shiny black; body yellowish green shaded with black; 
more or less distinct black blotches on sides, and a series of spots 
below spiracles. No distinct dark markings in early instars. 
Grerariouss=:.4- 200 wee Croesus latitarsus Nort., p. 580. 
Birch, wild cherry, poplar, and willow—Solitary. Length 1% 
inches; head creamy white; body greenish white; eyes and 
spiracles blackish. June—October_-___-_ Trichiosoma spp., p. 564. 
Rose—on upper surface of leaves. Length about 4% inch. Head 
yellowish; eye spots black; the food in alimentary tract causes 
the body to appear dark olive green 
Caliroa aethiops (F.), p. 565. 
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