156 ENTOMOLOGICAL NEWS. [May, 



its tip running parallel with the termination of the third vein; tegulse white, 

 with glistening white cilia; halteres honey-yellow. 



Female. Length 4-5.5 mm.; length of wings 4.5-5.5 mm. The face is 

 somewhat broader than that of the male; the abdomen, which has only 

 five apparent segments, is broader and flatter. The fore tarsi are plain, 

 the concavity of the first joint, the cluster and series of spines on the 

 plantar surface are much less conspicuous than in the male. The same 

 is true of the three black spines or spurs, at the distal end of the fore tibia. 



For the two male and three female specimens from which this 

 description is drawn, I am indebted to Mr. W. A. Snow, who 

 collected them on Old Woman Creek, Wyoming (twelve miles 

 north of Lusk) in July. The five specimens show a considerable 

 variation in the color of the wings and body, some of them being 

 much more yellow than others. There can be no doubt, however, 

 that they all belong to the same species. 



-o- 



NOTES ON OXYBELUS.-II. 



By CARL F. BAKER, Fort Collins, Colo. 



The species mentioned in this paper possess squamee having 

 lateral curved points. In all previously known species belonging 

 to this group the spine is emarginate at tip. Three of the new 

 species described herein (robertsonii, varicoloratus and hirsutus) 

 form a new group of this section, having the spine entire at the 

 tip. The new species are all Rocky Mountain forms, taken very 

 near or within the hills. Several of them, like Prof. Cockerell's 

 dadothricis \ have a much greater extent of rufous on the abdomen 

 than has so far occurred among eastern species. 



Oxybelus robertsonii n. sp. $. Vertex and thorax finely, somewhat 

 sparsely punctate, the occiput finely transversely striato-punctate. Pro- 

 thorax transversely carinate, not sharp angled at sides; mesonotum in 

 front, and scutellum and postscutellum medially carinate; squamae nearly 

 joining behind, with very large', strong, lateral points but little bent, their 

 tips somewhat exceeding tips of squama?; spine rather long, narrow at 

 base, towards the truncate tip flat and broadened to twice its width at 

 base, sides of apical third parallel; metathorax with median space long 

 triangular, passing into a short median carina, within transversely striate; 

 above and lateral faces finely transversely rugose; pleurae transversely 

 striate. Abdomen oval, finely, somewhat sparsely punctate, scarcely 

 constricted between the segments; last two segments coarsely punctate, 

 the apical trapezoidal, truncate at tip; without lateral spines. Color black; 

 pubescence silky, very thick on face, finer and thinner on rest of body; 



