228 nUnois State Laboratory of Natural History. 



Taken July 1 and 15 at Urbana, also near New Orleans 

 April 23. 



C. univittatus Macq. 



This species is very common about Urbana in woods 

 and orchards, and appeared in twenty-two collections be- 

 tween June 3 and July 28 — most abundantly about 

 June 21 — from Champaign and McLean counties. 



C vittatus Wied. [Fig. 41.] 



The larvae were found in connection with those of 

 Bittacomorpha, Limnophila, and Sialis in the weedy 

 swampy little stream at Station I. They were quite 

 common here, occurring in the mud aud the mats of dead 

 stems, rarely floating at the surface. The first were 

 seen March 28, but they continued to occur up to April 15, 

 increasing slightly in size. In the breeding-cage they 

 burrowed in the mud and through the vegetation. In 

 the latter part of May the water was allowed to dry awa^"" 

 and on the 28th all that remained was poured off. June 

 1-3, three pupae were formed in the damp mass of dead 

 vegetable matter resting on the mud in the cage. Two 

 imagos emerged June 9, both males, the third failing to 

 transform. The coloration of the larva readily distin- 

 guishes it. 



Larva [Fig. 41]. — Length 10-15 mm., diameter 1.6 

 mm. Head hght colored, mouth parts pale, tips of 

 maxillary palpi in line with end of labrum ; body whitish, 

 ^ mottled appearance within at middle of body. 



Dorsal and ventral areas striate, striae entire, distinct, 

 and not verj' fine; lateral striation a little finer, that of 

 prothorax very fine, with a small smooth spot adjoining 

 the smoother surface of its ventral area; latter shorter 

 than dorsal, not including anterior pair of setae, median 

 sulcus scarcely dull-pubescent. Meso- and metathorax with 

 lateral impressed lines, and dull-pubescent pale annuli, 

 but the lateral lines almost without pubescence. Fleshy 

 false feet of abdominals rather prominent, dorsal pair 

 united into one, there being no narrowing near the 



