NORTH AMERICAN HYMENOPTERA. 225 



rather abrupt behind and coarsely reticulated ; tegulae punctured, shining ; wings 

 ample, blackish, sometimes slightly paler about the middle, with a longitudinal 

 subhyaline streak in the second submarginal and second discoidal cells ; marginal 

 cell short, broadly truncate at tip and not exceeding the tip of the third submar- 

 ginal cell ; three submarginal cells, the first longer than the marginal, pointed 

 at either end ; the second as long as the marginal, pointed at base and greatly 

 narrowed towards the marginal, receiving the first recurrent nervure about one- 

 third from the base ; the third submarginal subobsoletely defined, short, the tip 

 extending beyond the marginal cell and pointed, the side nervures descending 

 almost parallel below the middle to the cubital nervure, where the apical nervure 

 becomes confluent with the second recurrent nervure ; legs deep black, with 

 black pubescence ; abdomen oblong ovate, gradually narrowed to the tip, black, 

 somewhat shining, closely and finely punctured, clothed above with dense black 

 pubescence, especially on the apical margins of the third and following segments, 

 large basal segment clothed, except at base, with short, dense, yellowish ferrugi- 

 nous or golden yellow pubescence, but not so dense as to hide two large, round, 

 yellowish ferruginous spots, one on each side behind the middle of the segment; 

 these spots appear sometimes more or less confluent, having the appearance of a 

 broad band ; the node is short and shining black, with a sparse black pubescence 

 except on the apical margins of the segments, where it is dense. Length 11-17 

 mm. ; expanse of wings 19-28.5 mm. (Cresson.) 



Hab. — Colorado. 



Spluerophtlialma asopus Cresson. 



Male.— Black, with large, close, deep punctures, and long black pubescence; 

 head, above the antennas, clothed with long red pubescence ; eyes small, rounded, 

 entire and convex ; antennae black at base, the flagellum brown sericeous ; thorax : 

 prothorax, mesothorax and scutellum rufous and clothed with long, dense, bright 

 red pubescence ; pleura and metathorax rufo-piceous, the latter more reddish at 

 base, reticulate with coarse punctures and clothed with long thin black pubes- 

 cence ; tegulge with reddish pubescence ; wings blackish, paler about the middle, 

 with a subhyaline dash in the second submarginal and second discoidal cells ; 

 marginal cell short, very abruptly and broadly truncate at tip ; two distinct sub- 

 marginal cells, the first as long as the marginal, the second a little shorter, re- 

 ceiving the first recurrent nervure about the middle ; the third submarginal cell 

 obsoletely defined ; legs entirely black, with black pubescence ; abdomen ovate, 

 gradually narrowed behind, the punctures not so large as those of the thorax;- 

 large basal segment rufous, less bright beneath, with a blackish longitudinal 

 stripe on the dividing suture between the dorsal and ventral surface, except ex- 

 treme base and apex is clothed with a dense, bright red pubescence ; on the rest 

 of the abdomen the pubescence is deep black, large ventral segment with a cen- 

 tral longitudinal carina, more sharply developed on the posterior half of the 

 segment. Length 11.5 mm. : expanse of w r ings 19.5 mm. (Cresson.) 

 Hab. — Colorado. 



This may be the male of S. cegina, as it resembles that species in 

 the distribution of color. 



Spluerophthalma hector Blake. 



Male. — Head black, round, coarsely punctured, clothed with coarse ferruginous 

 pubescence ; eyes small, round, prominent ; antennas black, scape closely punc- 



TKANS. AMER. ENT. SOC. XIII. (29) AUGUST, 1886. 



