102 HENRY SKINNER, EDITOR. 



treme lower angles of the front are fully double the size of those above ; those on 

 the face are about equal in size, the upper ones being triangular, the others of 

 nearly a uniform width ; the spots on the inferior orbits are much longer, with a 

 very narrow margin extending upwards along the posterior orbits adjoining the 

 eyes; face and front subshining, punctate and rugosely plicate, and sparsely 

 covered with fine black hairs; vertex with a brownish tinge; antenna? black; 

 the plumose aristae becoming yellowish towards the tip. Thorax a bluish-black, 

 shining, with fine black hairs, pleurae densely covered with long black hair, with 

 only a small tuft of yellow hair below the base of the wing; scutellum more 

 thickly covered with hair than the dorsal portion of the thorax. Abdomen shin- 

 ing, steel-blue, sides of the first three segments partly yellowish pollinose, leav- 

 ing numerous isolated or connected spots of the ground color; along the posterior 

 margin of the first and anterior margin of the second it extends well towards the 

 dorsum. Legs black ; the femora somewhat brownish, with a white pollinose 

 spot at the base of the posterior femora and on the outer side at the base of all 

 the tibia?. Wings, alula? and squama?, dark brown. Length 21 mm. 



One 9 , Beulah, New Mexico. This species nearest related to C 

 atrox Clark, from which it is readily separated hy having the last 

 segment entirely steel blue, and not sprinkled with irregular mark- 

 ings of yellowish pollen. 



Zonosema ? «lubia n. sp. — Head yellow, the face and orbital portions 

 somewhat lighter than the front and vertex ; antenna? yellow, ocellar tubercle 

 black. Thorax and scutellum reddish brown, bristles black, humeri and pleurae 

 yellow. Abdomen dark brown. Legs yellow. Wings hyaline, with a slight 



clouding along the basal transverse veins and 

 towards the stigma; a large cross-band ex- 

 tends from the stigma across the marginal 

 and suhmarginal cells, on each side of the 

 middle transverse vein, across the discal cell 

 to the middle of the third posterior cell; the 

 clouding along the posterior transverse vein 

 continues along the fifth longitudinal vein to the margin ; a large spot occupies 

 the apical portion, while a much smaller spot is situated in the marginal cell 

 midway between the end of the first and second longitudinal veins. Length 4 

 mm., wing 4 mm. 



Beulah, X. M., August 17. 



The following descriptions are contributed by D. W Coquillett : 



TRO< IIII.OI>i:S. new genus. 

 Near Triehopora, but the third antennal joint slender and elongated, 

 palpi present, proboscis setaceous, etc. Head nearly square, as long 

 at vibrissa? as at base of antennae, sides of face bristly, vibrissa? 

 slightly above anterior oral margin, proboscis two and a half times 

 as long as height of head, rigid, very slender, the labella also rigid 



