Descriptions and Records of Dees, 7G3 



LXXXTX. — Descriptions and Records of Bees. — XL. 

 By T. D. A. CocKERELL, University of Colorado. 



Alcidamea hjpocrlta (Cockerell). 



Osmia hiipocrita, Ckll., was described from a single female 

 taken at Boulder, Colorado. The range of the speeies is 

 very greatly extended by a female taken by Professor C. F. 

 Baker at Claremont, California. In the collection of 

 Pomona College is a male obtained at Durango, Colorado, 

 May 21, 1899 [Oslnr). The discovery of the male makes it 

 necessary to refer the insect to Alcidamea^ though it is an 

 aberrant member of that genus. 



(^ . — Length about lOi mm. 



Similar to the female in colour and form, except for the 

 usual sexual characters ; cheeks, posterior part of thorax at 

 sides, and abdomen above beyond second segment with 

 black hair; face and front with long erect wliite hair ; scape 

 long and curved, not much thickened; ilagellum long and 

 slender, faintly brownish beneath except at base, last joint 

 bent and sharply pointed ; sixth abdominal segment with a 

 rather short sharp median apical tooth (from which proceeds 

 upwards a delicate keel) and on each side a broader tooth ; 

 seventh segment triangular, with a small truncate apical 

 tooth, marked by a notch on each side ; venter with short 

 black hair, hind margin of first segment straight, of second 

 produced to a lobe ; hair of legs mainly black, but dull 

 white on anterior legs behind, and reddish on inner side of 

 tarsi. The hair of the thorax above is long and creamy 

 white. 



Easily known from A. uvulalis, Ckll., by the absence of 

 the large projection on venter of abdomen ; known from 

 A. hiscutellce, Ckll., by the colour of the pubescence and the 

 total absence of hair-bands on the abdomen. 



Alcidamea simplex (Cresson). 

 Fedor, Texas {Birkmann). Pomona College collection. 



Hoplitis sambuci, Titus. 



Claremont, California {Baker). New to California. 



The female is very like that of H. mescalerium, Ckll., but 

 has black spurs ; the head larger, especially in the occipital 

 region, and the vertex and disc of mesothorax more closely 

 punctured. 



