7. signatw 



263 



Nymph (Fig. 263) : very elongate, closely resembling the $ . The 

 scutum is comparatively somewhat shorter, the basis capituli has ventral 

 auricular ridges, and the spiracle is transverse-oval. 



Fig. 263. J. signatus o : capitulum and scutum, ventral aspect of capitulum (mutilated), 

 coxae, spiracle, anal grooves and tarsus 4. Same origin as the ? s in Figs. 261, 262. 

 (Original, G. H. F. N. del.) 



Larva (Fig. 264) : the scutum is angular laterally, with postero- 

 lateral borders concave. The main characteristics of the $ are 

 recognizable in the shape of the capitulum, the armature of the legs, 

 and the anal groove. 



<3 



Fig. 264. I. signatus larva (replete) : capitulum and scutum, capitulum in ventral 

 aspect (foreshortened to show hypostome), parts of venter, tarsus 3. From Brandt's 

 cormorant, Pai-ific Grove, California, 1894, ex V. L. Kellogg collection. (N. 290. 

 Original, G. H.F.N, del.) 



