224 CHARLES A. BLAKE. 



oils pubescence; eyes small, rounded, entire and covex; antenuEe black, the 

 flagellum sericeous ; thorax elongate, slightly narrowed behind the middle, rufo- 

 piceous above, with dense golden ferruginous pubescence, the sides and beneath 

 black, with sparse black pubescence ; nietathorax very abruptly truncate behind ; 

 legs entirely black, shining, with black pubescence; abdomen large, ovate, 

 densely and finely punctured, black, with black pubescence, except the large 

 basal segment above, which is densely clothed with golden ferruginous pubes- 

 cence, almost concealing two large, ill-defined, nearly confluent, ferruginous 

 spots on the disk ; the pubescence on the upper surface of the third segment is 

 mixed with golden ; the node black, short, circular at tip and depressed at base, 

 with a short emarginate process beneath ; venter entirely black and somewhat 

 shining. Length 16 mm. (Cresson.) 



Hab. — Colorado. 



This may be the female of 8. bioculata. 



SphH^rophtlialina antigiieiisis Fab. 



Male. — Body with dense, bright scarlet red hairs above ; beneath black ; an- 

 tennae, and inferior part of the head black ; wings black violaceous ; radial cell- 

 ule truncate at tip ; third cubital cellule pentagonal, contracted on the anal side, 

 its apical nervures almost obsolete ; metathorax black ; abdomen, anterior de- 

 clivity of the basal segment extending in an angle on the superior portion of the 

 segment, black ; petiole black ; venter with a slight scarlet red band rather 

 behind the middle. Length about nine-twentieths of an inch, 12 mm. (Say.) 



Female. — Head very large, of a ferruginous scarlet, the parts of the mouth 

 black ; antennae black ; thorax of a ferruginous scarlet ; abdomen black, clothed 

 with black hairs, second segment scarlet, having sometimes a small black spot 

 near the base ; apical margins of the last three segments fringed with silvery 

 pubescence; legs black, clothed with black hairs; spines black. Length 15 mm. 

 (St. Farg.) 



Hab. — Antigua, Mexico. 



Sphieroplithaliua iiieflea Cresson. 



Female. —Deep black, coarsely punctured ; head entirely black, suborbicular, 

 not wider than the thorax, clothed with coarse black pubescence; eyes small, 

 rounded, entire and convex; antenuse black, the flagellum sericeous; thorax 

 elongate, slightly narrowed behind the middle, clothed above with dense yellow- 

 ish ferruginous pubescence, on the sides and Iteneath with black pubescence ; 

 abdomen ovate, black, closely punctured, the punctures not so rough as those of 

 the thorax ; the large basal segment above obscure ferruginous and densely 

 clothed with yellowish ferruginous pubescence, the extreme base, the sides and 

 the rest of the abdomen with black pubescence. Length 14.5 mm. (Cresson.) 



Hab. — Colorado. 



^ipliaroplitlialuia bioculata Cresson. 



J/ttZe. —Black ; closely punctured, densely clothed with long black pubescence; 

 head entirely black ; eyes small, round, entire and very convex ; antennse nearly 

 as long as the head and thorax, black, the flagellum sericeous ; thorax ovate, 

 clothed above with long, dense, yellowish ferruginous or golden yellow pubes- 

 cence, beneath with black pubescence, as well as the metathorax, which is broad, 



