Sept., 'o6] ENTOMOLOGICAL NEWS. 257 



New Bees of the genus Colletes. 

 By M. H. Swenk, Dept. Ent., Univ. of Neb. 



Colletes hesperius n. sp. 



9. Length 14 mm. — Agrees with C. compactus, to which it is closely 

 allied, except as follows : Pubescence much paler and more abundant, 

 the hairs of the/ace, vertex and occiput all pale, or at most a few brown- 

 ish hairs on sides of vertex, the pubescence of thoracic dorsum pale dull 

 gray, with the black hairs comparatively few, sparse on the disk and 

 forming a rather thin scutellar fringe ; malar space nearly one-third as 

 long as broad ; joint 3 of antennae a shade longer ; first abdominal seg- 

 ment uniformly very finely, closely and weakly punctured (as different 

 as possible from the heavy, close double-sized punctuation of compactus), 

 the second segment minutely and indistinctly punctured ; abdominal fas- 

 ciae much broader and denser. 



O 7 *. Length 11 mm. — Sculptured much like compactus <^\ but easily 

 distinguished by having the pubescence entirely grayish white, a very few 

 pale brownish hairs on scutellum, but no black ones anywhere, the abdo- 

 minal fasciae much broader. 



Described from a 9 and a & type, both taken by Mr. C. V. 

 Piper at Almota, Whitman County, in western Washington 

 State. Types in author's collection. 



Colletes crawfordi n. sp. 



9- Length 8 mm. — Like C. intermixtus, but smaller and less robust ; 

 pubescence paler, that on vertex without any dark hairs whatever, that 

 of thorax nearly all pale, the dark hairs confined to a few, scattered ones 

 on disk and the usual scutellar fringe ; supraclypeal area dullish, more 

 punctured ; mesothorax similarly but much more coarsely punctured ; 

 those on mesopleura shallower and more irregular ; scutellum with only 

 a narrow basal impunctate line ; areas surrounding enclosure less coarsely 

 punctured ; first abdominal segment finely, closely and distinctly but not 

 deeply punctured (subimpunctate in intermixtus), following segments 

 finely, indistinctly punctured ; basal segment with short, sparse hair, the 

 venter densely fringed as in texanus ; outer spur of hind tibia distinctly 

 pectinate with about a dozen long teeth ; antennal joint 3 decidedly ex- 

 ceeding 4 ; legs with black hair as in intermixtus, but also on upper sur- 

 face of posterior tibiae ; the basal tarsal joint fully three times as long as 

 broad. 



Described from a single female specimen taken at Dallas, 

 Texas, October 8, 1905, on Physalis. This species is close to 

 C. latatarsis Rob. , which also visits Physalis, but differs in the 

 sparsely punctured clypeus, slender hind metatarsi and other 

 minor characters. From C. intermixtus Swenk it differs as 



