Sept., '06] 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 face, 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. 



<3\ Length n mm. Sculptured much like compactus rf 1 , 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 fascia? 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 te.vaniis ; 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 intermi.vtus, 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 Phy sails. 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. intcnnixtus Swenk it differs as 



