120 CHARLES ROBERTSON. 



AiKlreua iiaMOiiii 9 . — Black ; clypeus slightly convex, finely roughened, 

 with numerous shallow punctures ; basal process of labrum short, triangular, 

 broadly truncate ; third joint of antennae about the length of fourth and fifth 

 together, lateral depressions of face with the jnibescence whitish, cheeks narrow ; 

 mesonotum ojiaque, finely roughened, with sparse punctures, pubescence ochra- 

 ceous, disc of nietathorax with triangular enclosure bordered by a raised line, 

 rather strongly reticulated. Wings hyaline, nervures and stigma pale testaceous, 

 tegulfe mostly testaceous. Legs with pale i)ubescence, the scopa with rather short 

 hairs. Abdomen depressed, opaque, roughened with close shallow punctures, 

 apical margins of segments slightly and broadly depressed, narrowly testaceous, 

 with narrow whitish fasciie, interrupted anteriorly, fimbria pale ochraceous 

 Length 8-9 mm. 



Hill). — Illinois; four specimens. 



AiKlroiia spirjesiiia 9- — Black: head broader than thorax; clypeus 

 shining, tliinly pubescent, rather closely and strongly punctured, with a median 

 ridge, which is impunctate; basal process of labrum short and broad ; third joint 

 of antennffi shorter than next two together, flagellum dull testaceous beneath ; 

 mesonotum and scutellum rather closely and strongly punctured, clothed with 

 .short, thin, fulvous pubescence , metathorax strongly reticulated, the disc with 

 several short, slightly irregular longitudinal ridges, euclosure poorly defined lat- 

 erally, but bounded by a sharp ridge at the edge of the truncation. Wings hya- 

 line, nervures and stigma testaceous, the tegulse dull. Legs dull ferruginous, the 

 pubescence pale fulvous. Abdomen shining, finely and sparsely punctured, the 

 second segment presenting a faint fovea on each side near base ; the apical margin 

 depressed for about two-thirds of the segment medially, third and fourth seg- 

 ments depressed more than one-half, apical margins of segments 2-4 with narrow 

 fascife of white pubescence, interrupted broadly on second, less so on third ; fim- 

 bria fulvous. Length 9 mm. 



■J, . — Resembles the female, third joint of antennse shorter than fourth. Length 

 7 mm. 



H<ih. — Illinois; one male, nineteen female specimens. 



Closely resembles A. rugosa, but is smaller, more shining, less 

 strongly punctured on thorax and abdomen, mesonotum more thinly 

 pubescent. The males of this group are very hard to distinguish. 

 They can only be readily identified by comparison with the females. 



AiKlreiia liippotes 9- — Black, the middle tarsi and hind tibije and tarsi 

 red ; clypeus closely, strongly and evenly punctured ; basal process of labrum 

 short, broad, emarginate ; third joint of flagellum shorter than next two together, 

 disc of niesothorax strongly, not closely punctured, with thin, pale pubescence ; 

 enclosure of metathorax strongly rugose, poorly defined laterally, terminating in 

 a sharp edge at truncation. Wings nearly hyaline, nervures and stigma testa- 

 ceous, tegulee with a testaceous spot. Legs blackish, apical joints of front tarsi, 

 middle tibije at tips, their tarsi, and hind tibise and tarsi ferruginous red. Ab- 

 domen shining, closely and finely punctured, segments 2-4 depressed to the mid- 

 dle, or a little beyond on second : the same segments with interrupted fascite of 

 wliite pubescence, fimbria pale fulvous ; the usual fovea on each extreme side ol 

 second segment. Length 8-9 mm. 



