THE CANADIAN ENTOMOLOGIST. 241 



of the scutellum. The wings in some specimens are quite markedly 

 whitish dusted. 



An examination of the paratypes of this species in the U. S. N. M. 

 collection makes it evident that there is a slight error, due to a sh'p of the 

 pen, in the description quoted above. Instead of "first segment of the 

 abdomen with the lateral margins and a posterior band deep brown," the 

 description should read, "first segment of the abdomen, except the lateral 

 margins and a posterior band, deep brown." 



Leucopis maculata, n. sp. 



$ 9. — Length, 2.5-2.75 mm. Ground colour black, thickly dusted 

 with bluish-white pollen. Dorsum of the thorax without brown vittse, 

 with three parallel, narrow, light gray vittae, running backward from the 

 anterior margin of the mesonotum and fading out on its posterior half. 

 First segment of the abdomen, except the margins, sometimes darker gray 

 than the rest of the abdomen, the greater part of this segment bare, the 

 margins and the remainder of the abdomen with short black hairs. 

 Second, third and fourth segments each with a basal median vittula and 

 two lateral spots of velvety-black. On the second segment the basal 

 median vittula reaches about halfway to the hind margin of the segment, 

 tapering posteriorly. Lateral black spots small, irregularly circular, about 

 one-third the length of the segment in diameter. Lateral spots on the 

 third segment similar, the median vittula smaller, not reaching half way to 

 the hind margin of the segment. Lateral spots on the fourth abdominal 

 segment not half the size of those on the preceding segments, the median 

 vittula very small, sometimes evanescent. Tibiae, tarsi, and the apices of 

 all of the femora luteous, the tarsi sometimes infuscate toward the tip. 

 Femora, except the tips and sometimes the narrow bases, concolorous 

 with the rest of the body. Face, front and cheeks thickly dusted with 

 whitish pollen, palpi and antennae black, the latter thinly dusted with 

 whitish pollen. Wings milky, uniformly whitish dusted. 



Described from four specimens, three cJ 's and one 9. bred from 

 Eriopeltis coiorude?isis, by Messrs. H. S. Smith and M. H. Swenk, at 

 Calvert, Nebraska, Nov. 15, 1909. Type No. 13141, U. S. N. M. 



The larvae of this species were found feeding upon the egg-mass of 

 the above-mentioned scale insect. They appear to be predatory in habit, 

 somewhat resembling Syrphid larvse in their mode of attack, like the other 

 species of the genus of which the habits are known. 



As will be seen from the above description, this species resembles Z. 

 bellula Will, in the markings on the abdomen, but differs from it in the 



