Sept., '06] ENTOMOLOGICAL NEWS. 259 



mesopleura sparse, shallow and indistinct ; basal two segments scatter- 

 ing^, feebly punctured, 2-5 with more decided apical fringes, the seg- 

 ments abundantly provided with long, erect, pale hairs. 



Described from i 9 and 8 % co-types, taken by Mr. Mor- 

 gan Hebard in northern Michigan (Baraga County), along the 

 shores of Lake Superior, as follows : Baraga County, ' 'barrens 

 near marsh," July 18, 1903, 1 9; July 20, 2 $ . Pequaming, 

 "in meadow," July 2, 1 % ; July 15, 2 % . Point Abbaye, 

 " in huckleberry barrens," July 10, 1 % ; July 24, 1 % . 

 Apparently the species flies principally during July. 



Collet es pleuralis n. sp. 



9. Length 9 mm.— Very close to C. californicus, but differing as fol- 

 lows : Hind tarsi more slender, the basal joint three times as long as 

 wide, the inner surface with the hairs mostly pale brownish instead of all 

 black ; basal abdominal segment with long, sparse, pale hair, 2 and 3 

 with shorter pale hairs ; first recurrent nervure entering second submar- 

 ginal cell basad of middle as in californicus, but third submarginal less 

 narrowed above so that its upper length is more than twice as long as 

 that part of the lower length distad of the junction with the second recur- 

 rent nervure ; malar space slightly longer, about one-third as long as 

 broad ; entire bowl of enclosure tranversely ridged, the surrounding sides 

 opaque, minutely reticulated ; vertex subuniformly more coarsely punc- 

 tured. 



(j\ Length 8 mm. — Much like californicus tf, but easily distinguished 

 by having the pubescence of abdomen wholly or mostly pale, forming 

 apical fringes to the segments, much as in pascoensis, the black hairs be- 

 ing much reduced, very different from the uniform jet-black abdominal 

 pubescence of californicus ; malar space decidedly longer, about one- 

 half as long as broad. 



Described from a pair collected in Gallatin County Montana 

 (6,800 feet), June 27, 1900, by Prof. Cooley. I have also two 

 males collected in the same county at an elevation of 8000 ft. , 

 July 22, 1900, by Mr. E. Koch. Types in author's collection. 



Colletes birkmanni n. sp. 



?. Length ir mm. — Stoutly built. Clypeus coarsely striate-punctate, 

 depresseo before the transverse apex, supraclypeal area sparsely punc- 

 tured. Malar space one-fourth as long as broad. Vertex with a few scat- 

 tered course punctures, otherwise shining, subimpunctate. Cheeks finely 

 closely punctured. Antennae black, joint 3 equals 4. Face with distinct 

 deep close punctures, its pubescence short, rather sparse, silvery, intero- 

 cellar tuft and occipital hairs tinged with yellowish. Pubescence of thora- 

 cic dorsum pale ochraceous, very slightly fulvescent, that on metathorax, 



