389] LARVAE OF THE TENTHREDINOIDEA—YUASA 71 



"the characters of both the adult and the larva point out subfamily 

 difference between Caulocampus and Priophorus" and that the former 

 superficially resembles Hoplocampa in all stages but is really related to 

 Craterocerus. The difference of opinion is due to the different value 

 placed by these two writers on the presence or absence of the radial cross- 

 vein in differentiating the subfamilies. The genus Caulocampus has been 

 discussed in connection with the Hoplocampinae because the larvae of this 

 genus are very different from those of the Cladiinae both morphologically 

 and biologically and because they are more naturally associated with the 

 larvae of the Hoplocampinae. Anoplonyx is represented in the Neartic 

 region by a single species. Platycampus includes four American species, 

 two of which have been recognized in the immature stages. P. americana 

 feeds on Populus and P. juniperi on juniper. None of these larvae have 

 been examined. 



GENERA OF CLADIINAE 



1(2) Body spotted, with a row of blackish or brownish spots on subdorsal, supraspiracular 

 or subspiracular lines; setae usually recurved exceedingly long, longest ones longer 

 than one-half the height of the head; annulet 1 usually with one seta on each side of 

 meson Trichiocampus Hartig. 



2(1) Body never spotted; setae usually straight, long, but the longest ones never distinctly 

 longer than half the height of the head; annulet 1 always with more than one seta on 

 each side of meson, usually with four to six setae 3. 



3(4) Head with spots, usually with blackish patches on dorso-meson of vertex and caudad 

 of each ocellara; body dorsad of spiracular lines usually shaded darker than the 

 venter; body sometimes pinkish; postsupraspiracular tubercles usually with three 

 setae, never with more than four Priophorus Dahlbom. 



4(3) Head never with spots, usually uniformly greenish; body dorsad of spiracular lines 

 never shaded darker but concolorous with venter; body never pinkish but greenish 

 yellow or whitish; postsupraspiracular tubercles usually with six setae, never with 

 less than four Cladius Rossi. 



Trichiocampus Hartig 



Larvae small to moderately large, length from 10 to 25 mm., distinctly 

 hairy, with segmentally arranged spots; body with a longitudinal row of 

 blackish or brownish spots along subdorsal, supraspiracular, or subspiracu- 

 lar lines; annulet 4 shortest, annulet 1 usually with one and sometimes two 

 setae on each half of body, annulet 2 with tubercles bearing 2-5 setae, 

 annulet 3 with three warts, two dorsal ones bearing 4-5 setae and ventral 

 one with 6-9 setae, postspiracular tubercle usually with two setae, sub- 

 spiracular lobe with 8-9 setae, surpedal lobe with 6-10 setae; setae usually 

 recurved, variable in length, longest setae nearly subequal in length to 

 the height of head; warts or tubercles with setae of varying length, those 

 on annulet 1 among the shortest. 



