Records of Dees. GG9 



silvcry-wliito Imir ; nic?otl)orax broadly bordered in front 

 (except it) middle) witb pale oebreous liair, these bands 

 giviuij rise at their inner ends to snl)trianirnlar but thin and 

 ineons|)ien()ns baekwardly direeted lobes (in subalijinus are 

 instead two ratlier narrow longitudinal bauds, and no hair 

 along the front cxecpt at extreme sides) ; pleura densely 

 covered with liair, white below, ochreous-tinted above ; 

 scutellura strongly depressed in middle, and axillar teeth 

 larger ; teguUe brighter red ; black transverse area on first 

 abdominal segment with its edges more or less overlapped 

 by liair, not clean-cut ; ajjical band of first segment not 

 interrupted. Apical plate of abdomen narrow, dark rufous ; 

 fourth and fifth ventral segments fringed with fuscous hair. 

 Eyes green ; antennic black, with the third joint red below. 

 Legs red, with the anterior femora black, their tibiaj black in 

 front, middle femora with a suffusrd black area above; 

 spurs l)lack ; second s.m. triangular, narrowed to a point 

 above ; band on second abdominal segment with a large 

 rounded lobe on each side. 



Hub. North Boulder Creek, Boulder County, Colorado, 

 in the Canadian Zone, Aug. 22, 1907 {S. N. Rohivev). 



I thought at first that this was the male of T. subulpi)ms, 

 but there are too many differences, and I can only suppose 

 that the two arc very closely related but distinct species. 

 In Robertson^s table of Triepeolas (1903), T. rohweri runs 

 nearest to T. helianthi, from which it differs by the hairy 

 pleura and other characters. As in helianthi, the labrum is 

 black, 



Triepeolus poenepectoralis , Viercck, 1905. 



Wawawai, Washington State, both sexes, ? Sept. G, 

 S Aug. 30, 1908 {W. M. Mann). 



New to the United States, and the male is new. The 

 male is like the female except for the usual sexual differences, 

 and the rather greater development of the light hair. The 

 longitudinal bauds on the mesothorax in front reach the 

 anterior margin, the whole of the anterior part of the pleura 

 is covered with hair, and the basal hair-band of the first 

 abdominal segment is not broken. Mr. S. A. Rohwer 

 studied this species somewhat, and noted that it was closely 

 related to T. subulpinus. The female is readily separated 

 from subalpinus by the larger and broader pygidial area 

 (false pygidium), the upward lateral hair-lobes on second 

 abdominal segment directed inwards so as to make an acute 

 angle with the transverse band (in the manner of T. pccto- 



