ART. IX.-NEW ENTOMOSTRACA FROM COLORADO. 



By Y. T. Chambers. 



Figs. 1-4. 



Cypris grandis n. sp. (Fig. 1). — Valve oblong, slightly subreniform, 

 iiighest behind the middle, sloping thence regularly toward the anterior 

 ■end, with a slight bulge on the hinge-margin just where it rounds off in 

 front. Greatest thickness about the middle. In side-view somewhat resem- 

 bling Brady's figure of C. tessellaia (Trans. Linn. Soc, v, 26, plate 23, 

 fig. 39), but this species is longer in proportion to height and has the 

 highest point of the dorsal margin a little farther behind. Yentral mar- 

 gin very slightly emarginate. In dorsal and ventral view, somewhat re- 

 sembling Brady's figure of Macroci/pris mmna {loc. cit., plate 28, fig. 34). 

 Eight valve slightly overlajiping the left; surface smooth, with minute 

 punctures and short hairs, but with a group of scattered, large, sordid, 

 yellowish punctures about the middle of each valve. Color bluish- 



FiG. 1. — Cypris grandis, Cham., u. sp. 



white (nearly that of very thin milk), though some specimens show a 

 decided pale greenish tinge. Basal joint of superior antenna? with 

 two short seta? above and one below ; second joint with a single short 

 one below; third with two short unequal sette above and one below; 

 fourth with two above like those on the third, and two long ones below ; 

 fifth as the fourth ; sixth with the two upper setse as in the third and 

 fourth, but with four long ones below ; seventh with two long and two 

 shorter seta?. Inferior antenna? with one moderately long and two short 

 claws, and two seta? from the end of the last joint, and with four long 



