NO. 1463. REVIEW OF THE GENVS COSMOPTERYX—BUSCK. 713 



Habitat. — District of Columbia, Virginia, Maryland. 



Food plant: Panicinn clandestinwin. 



Type —Cat. No. 9777, U.S.N.M. 



Described from many specimens bred by the writer from mines 

 collected early in June in the coimtr}^ surrounding Washington Cit3\ 



The mine is an irregular longitudinal clear blotchmine with the frass 

 ejected at one end. The larva is light green with short light hairs 

 and with yellow head and thoracic shield. At maturity it assumes a 

 brilliant wine-red color in three broad longitudinal stripes, and cuts 

 a circular piece out of the epidermis of its mine, which it bends length- 

 wise and uses for a cocoon exactly like the genus Cycloplasis Clemens. 



The imagoes issued late in July. Dr. H. G. Dyar has made the 

 following description of the larva: 



Head flattened, disk-like, elongate, clypeus rather broadly triangular, lobes meet- 

 ing above, pale, unmarked. Cervical shield large, very weakly cornified, ill defined, 

 luteous; body slightly flattened, subequal tapering at the ends, segments submonili- 

 form; feet normal, moderate, the thoracic ones distinct pale, the abdominal ones 

 truncate cylindrical, with a small circle of hooks; setpe small and obscure, pale, 

 without distinct tul)ercles, fairly long, apparently normal, iv and v separate. Color 

 pale, with broad blotchy subdorsal and subventral broad red stripes. 



