XXxiii, '22] ENTOMOLOGICAL NEWS 137 



rot highly polished, with a sparsely polliniferons median stripe. Wings 

 yellowish with dark base. Length 2.5 mm. 



T\pc. 9 ?; Guantanamo. Cuba. February 10, 1914 (Henry 

 Skinner). [A. X. S. P., No. 6346.] Paratypcs2 9 ? : topo- 

 typical. 



Psilopa olga new species. 



Very similar to P. Icncoxtoniii Meigen of Europe, which also occurs 

 in our fauna. In the present species the antennae and legs except the 

 tarsi are black. The wings have a distinct fuscous spot at the tip of the. 

 third vein and a faint one at the tip of the fourth. 



Type. S ; Olga, Washington. J ul >" 26, 1909 (A. L. M dan- 

 der). [Washington State College Collection.] I'.initypcs 



2 $,2 9 ; topotypical. 

 Psilopa dimidiata new specie?. 



Very similar to Psilof>a olf/a, but less polished ; face more shining 

 with scarcely noticeable white pollen, and in profile more convex ; 

 cheeks narrower; wings at most with traces of spots at tips of veins. 

 Length 2 mm. 



Type 3 ; Chalcolet, Idaho, August, 1915 (A. L. Alelan- 

 der). [Washington State College Collection.] Parutypcs. 



3 $,6 9 ; topotypical. 

 Trimerina adfinis new species. 



Black: antennae except third joint above and apices of tarsi, yellow. 

 Middle and hind femora and bind tibiae somewhat bnmnish. Palpi 

 brownish. Halteres white. Wings brownish; cross veins clouded, and 

 brown spot at tip of submarginal cell. Shining, at most thinly grayish 

 or brownish pruinose. Face subopaque, grayish white. Moonotum 

 and scutellum faintly and minutely punctured. Latter noticeably 

 bronzed. Head in profile flattened, with frons and face nearly vertical. 

 Face long; median area transversely convex, with two bristles each 

 side. Mesonotum without prescutellars, but with setulac distinctly seri- 

 ated. Abdomen with lateral margins revolute. Length 2 mm. 



'r\<pc. 9 : Kaslo, Hritisli Columbia, February ~ J . ( R. \\ Cur- 

 rie)~ [U. S. N. M., No. 21843.1 Paratype.--\ 5 ; topotypical. 



Discocerina aliena new species. 



Black, \vith bases of tarsi pale. Halteres white. \\ ings hyaline, 

 with dark veins. Shining to polished: frons more obscured, brownish, 

 becoming whitish anteriorly. Face opaque, silvery or while, flattened 

 below, or with slight median swelling: t'ovcae shallow: one bristle 

 present at slightly below middle of profile; parafacials linear. Length 

 3 mm. 



'fypc. - ' ; P.erkeley. Alamcdn County, California. l ; cbru- 

 ary"23, 1908 (Cresson). [A. X. S. I 1 .. No. 6347.] Pani- 

 tvpcs. 2 S, 1 9 ; topotypical. 



