40 THE CANADIAN ENTOMOLOGIST. 



Colleies petalostemonis, n. sp. — 9 • Length 7-8 ram. Very like to C. 

 clypeo?iite?is, to which it is most closely related, but differs as follows: 

 Clypeus not sulcate nor its apex emarginate. Malar space about as long 

 as wide. Flagellum merely fuscous below, its first joint subequal to its 

 second. Vertex with distinct punctures of two sizes. Punctures of face 

 distinct. INIesothorax similarly, but more coarsely punctured, those on 

 pleura coarse and close, scutellum coarsely and sparsely punctured pos- 

 teriorly. Pits on superior metathoracic face even more irregular, and the 

 median broadening much more pronounced. Bowl of enclosure very 

 convex, bulging. Wings white, nervures yellow, becoming dark toward the 

 apex, the stigma large, fuscous. Abdomen similarly shaped, but much 

 more coarsely punctured, these very distinct and quite well separated on 

 segment i, fine and close on 2, indistinct on following segments. Tergum 

 with similar appressed pile. Entire pubescence of a more silvery, less 

 yellowish cast, tinged with the latter colour slightly on thoracic dorsum only. 



$ . Length 7 mm. Clypeus concealed by long, dull white pubescence. 

 Malar space slightly over twice as long as wide. Flagellum brown below, 

 its first joint two-thirds as long as its second, both black, the brown joints 

 over twice as long as wide. Abdomen very coarsely punctured, especially 

 on segment i, segments 1-6 with broad white apical fasciae, the spaces 

 between with thin pale pile not nearly concealing the surface, basal 

 segment with long white hair, very erect, denser laterally. Otherwise 

 essentially like the $ . 



Types. — Warbonnet Canon, Sioux County, Nebraska, July 20, 1901 

 ( 9)5 July -^3, i9'^i((?)' on Petalostemon candidiis. (M. Cary.) 



Paratypes.^ — Glen, Sioux County, Nebraska, August 9, 1905, on 

 Petalostemon ca?ididiis, 4 ? ; do. August 14, i 9 J 4° miles north of Lusk, 

 Wyoming, July, 1895, (F. H. Snow) ^ , $ . This species seems to be oligo- 

 tropic on Petalostemon candidiis, and is not common even where the plant 

 is abundant. 



Colletes solidaginis, n. sp. — 9 • Length 9 mm. Head very short and 

 broad, the eyes large. Vertex scarcely depressed, minutely punctured, its 

 sides bare, the hairs between the occeli long and erect. Clypeus some- 

 what shiny, uniformly slightly convex, roughened by close, coarse punctures 

 which form irregular strise, the apical rim prominent, intensified by a trans- 

 verse depression immediately preceding it, covered with a sparse, short 

 pale ochraceous pubescence. Front covered with a short, dense, pale 

 ochraceous pubescence, concealing a dull, finely-roughened surface, 



