NORTH AMERICAN HYMENOPTERA. 219 



pruinose ; eyes round, polished ; thorax ovate densely covered with yellow pu- 

 bescence ; legs black, thinly clothed with long silvery hairs, spines of tibife and 

 tarsi fuscous ; abdomen ovate, apical margin of basal segment fringed with pale 

 pubescence, basal half of second segment black, closely punctured, clothed with 

 erect black hairs, apical margin and remaining segments clothed with yellow 

 pubescence ; ventral segments black, deeply punctured ; entire insect beneath 

 thinly clothed with long silvery hairs, more dense on apical margins. Length 

 10-12 mm. 



Hah. — Kansas, Utah. (Snow.) 



Sphierophthalina californica Radosz. 



Female.— B\a.c^i. ; the head above the eyes, the thorax above and the abdomen 

 above, except the extreme base, densely clothed with feiTuginous pubescence, 

 sometimes varying to golden ochraceous ; the head is subquadrate, but not broader 

 than the thorax, the eyes are small, rounded, entire and convex, the antennje are 

 black, and somewhat sericeous ; the thorax is short, broad ovate when viewed 

 from above, the punctures are close and rather coarse, the metathorax abruptly 

 truncate behind ; the legs are entirely black, with black pubescence : the ab- 

 domen is ovate, closely and deeply punctured ; the node, the base and sides of 

 the large basal segment as well as the venter entirely, more or less clothed with 

 black puliescence. Length 9-15 mm. (Cresson.) 



Hall. — Califoi-nia. 



Sphterophthalina plisedra Blake. 



Female. — Ferruginous ; head subquadrate, posterior angles rounded, vertex 

 clothed with deep golden pubescence ; antennte fuscous, flagellum pruinose, tips 

 of niandibles blackish ; eyes round, cheeks fuscous, closely punctured ; thorax 

 short, ovate, clothed on disc with deep golden pubescence, flanks fuscous, meta- 

 thorax abruptly truncate ; legs fuscous, thinly clothed with long whitish hairs ; 

 abdomen elongate ovate, densely clothed above with deep golden pubescence, 

 interspersed with long erect hairs of same color, fringes of apical margins more 

 dense ; uuder side fusco-ferruginous, sparsely punctured. Length 7 mm. 



Hab. — Nevada. 



Allied to auraria, hnt may he distinguished hy the tegument being 

 ferruginous. 



Nplisproplithaliiia f iilvoltirta Cresson. 



3/rt?e. — Head black, coarsely punctured, with long black pubescence, mixed 

 with fulvous on the vertex ; eyes small, rounded, entire and convex ; antennae 

 about as long as the head and thorax, black, sericeous ; thorax coarsely punctured, 

 black, the upper surface clothed with a long, dense, bright fulvous pubescence ; 

 on the sides and beneath it is black ; metathorax broad, abrupt behind, rounded 

 on the sides, reticulated with coarse punctures and thinly clothed with fulvous 

 pubescence ; wings ample, blackish, much paler about the middle ; the cells much 

 as in i'^. monticola, except that the third submarginal cell (which is also very in- 

 distinctly defined) is more narrowed beneath, and the second submarginal re- 

 ceives the first recurrent nervure more towards the middle ; legs entirely black, 

 with black pubescence ; abdomen ovate, black, shining, closely punctured and 

 clothed with black jiubeiscence ; apical margin, sometimes the apical half of the 



