172 BULLETIN 143, UNITED STATES NATIONAL MUSEUM 



pronotum longitudinally striate; junction of cephalic and dorsal 

 face of pronotum angulate; propleura with moderate, separated 

 punctures; anterior half of mesopleura with close, very fine punc- 

 tures, the posterior half with very large, confluent punctures ; ventral 

 half of metapleura with moderate, scattered punctures, dorsal half 

 impunctate, glabrous; sides of propodeum with moderate, shallow, 

 separated punctures; basal half of posterior face of propodeum 

 with moderate, separated punctures, the dorsal half very coarsely, 

 confluently punctate ; scutellar scale prominent. 



First tergite of abdomen red, with moderate, separated, punc- 

 tures on the disk and close, small punctures at the apical margin, 

 the latter with a thick fringe of silvery hairs; second tergite black, 

 with a pair of large, pale yellow, rectangular spots on the apical 

 half, with very close, elongate, confluent punctures on the disk, the 

 punctures separated laterally, and distinctly separated on the pale 

 spots; pubescence of second tergite sparse, recumbent, black except 

 laterally with the pubescence silvery and the pubescence of the pale 

 spots corresponding with the color of the integument ; apical margin 

 of second tergite with a thick fringe of silvery pubescence; tergites 

 3-5 black, with close, coarse, confluent punctures, the apical margin 

 of each with a thick fringe of silvery pubescence ; pubescence of disk of 

 third tergite black, of the fourth and fifth silvery ; pygidium distinctly 

 longitudinally striate, the lateral margins somewhat reflexed; first 

 sternite ferruginous, the median longitudinal carina not well de- 

 veloped, with a few small scattered punctures; second sternite dark 

 mahogany red, with large, elongate, well-separated punctures, except 

 at the base medially the punctures smaller and closer, apical margin 

 with a thin fringe of silvery hairs; sternites 3-5 closely punctate, 

 the apical margin of each with a thin fringe of silvery hairs. 



Legs ferruginous, clothed with sparse, pale silvery hairs. 



While higuttata was originally described and has been considered 

 as a variety of quadriguttata^ the series of specimens at hand indi- 

 cate very clearly that it is a distinct species. The specimens vary 

 in length from 8.5 to 13 mm. This species is very distinct from 

 quadnguttata in having only two pale spots on the second tergite of 

 the abdomen, the tubercles of the posterior margin of the head much 

 more prominent, and the junction of the cephalic and dorsal surface 

 of the i3ronotum angulate rather than rounded. It differs from 

 curticeps in having the tubercles much closer to the median line of 

 the head, thus giving it a less truncate appearance posteriorly, and 

 by the absence of the thick brush of hairs on the propodeum. The 

 specimen from Fort Apache, Ariz., is not typical in color; it has 

 the abdomen distinctly ferruginous. 



