THE CANADIAN ENTOMOLOGIST. 389 



D. tuaimanensis, nov. sp. 



Head, antennje and tliorax black, the latter shining, bifoveate with 

 oblique depressions, scutel black, elytra black, shining, a common sutural 

 vitta attaining the convexity, the lateral marginal almost to the apex and 

 a humeral elongate spot not attaining the middle all flavous; beneath black, 

 more or less testaceous ; legs testaceous with apex of femora, tibia; and 

 tarsi black. T.ength, 4-43^2 nim. 



Type. — Prov. Tucuman Rep. Argentine, xii, 1889, C, Bruch. Two 

 other examples from apparently same source. 



Easily distinguished by its long, narrow, parallel form, with the short 

 elongate flavous streak back of shoulder. In the two co-types the thorax 

 is infuscate at the middle and the sutural vitta is complete to the apex ; 

 all have the elongate humeral streak well marked. 



D. Bnichii, nov. sp. 



Head black, mouth-parts piceous, antennae slender, black, reaching 

 the posterior third of elytra^ piceous at base ; joints 3-4 equal ; thorax 

 flavous, rufous, narrow, elongate, bifoveate, elytra slightly dilated behind, 

 smooth, dull black, very finely punctulate striate (in the white vittas), the 

 lateral margin and a straight median vitta, joined behind, white ; beneath 

 and legs black, base of femora white. Length, 3^-4 mm. 



Type. — Rep. Argentine (Geb. formosa ?) 1-1905, C,, B-uch, also 

 Paraguay. 



Would be placed near grannlata Jac, from Mexico. Thr '^mooth, 

 dull black elytra easily distinguish this from all other vittate forms known 

 to me ; the Paraguay example does not differ materially from the type. 



(7^0 be continued.) 



RECORDS OF BEES. 



BY T. D. A. COCKERELL, UNIVERSITY OF COLORADO. 



Osmia hesperella Cockerell. 

 Females were found nesting in a hole in a wall, in Boulder, Colorado, 

 June. Specimens from the same place, and apparently the same nest or 

 group of nestSj vary in the colour of the ventral scopa, from light golden 

 to a mixture of light golden and dark fuscous. The eyes in life have the 

 upper third and the hind margin dull sage green, the rest black. The varia- 

 tion in the colour of the scopa led me to reconsider the insects separated as 

 O. coloradella Ckll. and O. ratnaieyi Ckll. According to previous observa- 

 tions, true hesperella has the scopa white, ramakyi has it orange, and 



November, 1911 



