190 NEW YORK STATE MUSEUM 



dd, Not as above 



t? Dorsum of each median abdominal segment marked with spines 

 of several sizes; those in a transverse row near the anterior 

 and the posterior margins are most prominent 



32. nigricans n. sp. 

 ee The spines most conspicuous in two oblong patches beyond the 

 middle of each segment 

 f The teeth of the comb of the eighth segment projects caudad, 



pl.22, figs. 15 and 16 43a. Var. a of m o d e s t u s 



// Teeth of the comb of the eighth segment project later ad. 

 Markings on the abdomen resembles pl.22, fig.15, but covers 

 more area on the anterior segments 48. dux n. sp. 



Weyenbergli (1874) gives a few notes on the larvae of several 



species, among others, C. nubecnlosus, divers us, 



r i p a r i u s, annularis, c h 1 o r i s , v i r e s c e n s, and 



tentans. Oftentans onlj is a description given. Doctor 



Dyar (1902) gives descriptions of larva and pupa of C. anony- 



mus Will. (No. 55). This description is in part reproduced on 



a subsequent page. 



Imagines 



Most of Say's and Wiedemann's species have been recognized and have 

 been placed in the following key. Of Walker's species only one or two 

 have been recognized and for this reason a separate key is given upon a 

 subsequent page for them : 

 a Wings with spots or cross bands 



h Dorsum of thorax polished black (humeri may be yellow) 



c Humeral region of thorax tinged with yellow, wing with only a faint 



cloud 1. brachialis 



CO Thorax entirely black (var. of above?) 2. a t r i m a n u s 



56 Dorsum of thorax not polished black 

 G Wings with spots 



d Each wing with about eleven spots ; brownish or greyish species ; 



3 mm. in length (New Mexico) 3. varipennis 



dd Wings not so marked 



e Thorax pale yellow, wing with four spots ; length 1.2 mm. 



Cuban species 4. octopunctatus 



ee Thorax brownish 



f Wing with three dark spots ; thorax indistinctly striped ; abdo- 

 men dusky ; length 2 to 2,5 mm 5. scalaenus 



■ft Wing with five or six spots, or bars ; abdomen of female with 

 whitish posterior margins to the segments ; length 2 mm. 



(St Vincent Island) .6. sp i 1 opt er us 



cc Wings with cross bars 



d Brownish species ; abdomen of female black with white posterior 

 margins to the segments ; length 2 mm. (St Vincent Island) 



6. spilopterus 



