THE CANADIAN ENTOMOLOGIST. 141 



Pterallastes rather than in Triodonta is simply the general habitus. I 

 think that too much importance has been placed on the presence of pollen 

 on the thorax as a generic character. 



33. Criorhina verbosa^ (Harris) Walker. List iii., 568. 



I have one male specimen bearing the label " St. Anthony Park, 

 Minn." that I am quite certain must be this species. The description 

 applies exactly except as to the median facial stripe. A thick coating of 

 grayish pollen covers the face uniformly throughout ; the cheeks, however, 

 are shining. 



34. Pocofa bomboides, n. sp. 



Black, but little shining, face black, first three abdominal segments 

 black pilose. 



Male. — Very much like P. i^randis, but legs unarmed and much 

 smaller. Anttyinaj and arista reddish-yellow, the basal joints brownish. 

 Face black, indistinctly white pollinose, a broad stripe and the cheeks 

 shining. Dorsum of the thorax long yellow pilose before the base of the 

 wings, the remainder and the scutellum black pilose. Abdomen — First 

 three segments black pilose ; all except the first with indistinct posterior 

 margins. Fourth segment more shining than the others, with a band of 

 dense long yellow pile occupying the anterior half, the remainder of the 

 segment black pilose. Legs simple, without spines or tubercles, black 

 pilose ; all the femora black except the extreme apex, on the posterior 

 femora the apex is more broadly reddish ; anterior tibiie on the basal 

 half, middle except an indistinct broad band, posterior entirely dark 

 reddish brown, tarsi all reddish, two apical joints black. Wing strongly 

 tinged with reddish, forming a large spot extending from the stigma to 

 the base of the second posterior cell. L. corp., 12^ mm.; al., 11^ mm. 



One specimen : Summit Sierra Nevada, California. 



This species must resemble P. apiformis of Europe even more than 

 P. gratidis, Will., does. It differs from that species in not having yellow 

 pile on the third abdominal segment and in the face being entirely 

 black. It is very striking in general appearance as a miniature of P. 

 grandis, Will. It is, however, easily separable from that species by the 

 unarmed femora, coloured wings and black face. 



The above is a manuscript name by Dr. WiUiston which I found 

 attached to the specimen in the collection of the Kansas State University. 

 The manuscript containing it had been misplaced. I thus continue the 

 name although the description is my own, 



A 



