148 



CHARLES ROBEETSON. 



Agapusteinon bieolor 9 .—Head and thorax green, the abdomen black ; 

 clypeus produced, black at apex, mandibles at base pale yellow, at tips rufo- 

 piceous ; anteuuse black, flagellum testaceous beneath ; face with confluent punc- 

 tures, mesoscutum densely punctured, the punctures becoming confluent ante- 

 riorly, metanotum less rugose than in A. radiatus ; wings yellow hyaline, uer- 

 vures, stigma and tegulse testaceous, the latter with a pale yellow spot in front; 

 anterior and middle femora black, anterior and middle knees yellow, elsewhere 

 the legs a more oi- less dull ferruginous; abdomen closely and finely punctured, 

 basal margins of all the segments with dense, appi-essed, pale pubescence, more 

 or less interrupted in the middle. Length 10 — 12 mm. 



% . — The male resembles that of A. radiatus. but is distinguished by its larger 

 size, slightly more slender femora, its metanotum less rugose. Length 10 — 12 mm. 



Hah. — Illinois; a comiuon species. 



Agapostemoii tricolor Lep. 



The description gives the ornaments of the males of either of the 

 above the species. An examination of the type would be necessary 

 for it?; determination. The niales of the different species are very 

 difficult to determine, but they show a metathoracic sculpture like 

 that of the females to which they belong. A. nigricornis, however, 

 as observed above, can be distinguished by its thickened hind feniora. 



AiKlreua serotina 9.— Black, clothed with thin pale ochraceous pubes- 

 cence; clypeus finely roughened, hardly shining, with large, sparse punctures; 

 basal process of labram subtriangular, broadly truncate at tip; mandibles at 

 apex rufous, flagellum beneath dull testaceous; mesonotum finely roughened, 

 with sparse, shallow punctures; enclosure of metanotum large, rather coarsely 

 reticulated. Wings fulvo-hyaline ; nervures, stigma and spot on tegulse testa- 

 ceous. Legs, especially the tarsi, fusco-ferruginous. Abdomen minutely rough- 

 ened and finely punctured, apical margins of segments pale testaceous, 2-4 

 slightly depressed and bearing interrupted fasciae of whitish pubescence; anal 

 fimbriie fulvous. Length 7 — 8 mm. 



% . — Head broader than thorax, clypeus shining, finely and sparsely punctured, 

 thinly pubescent, apex strongly produced and widely emarginate at tip ; mandi- 

 bles long, decussate, rufous at tip; flagellum testaceous beneath, cheeks strongly 

 produced behind the eyes and surrounded by a carlnate border, vertex nearly 

 carinate; tegulaj more testaceous than in female. Legs dull ferruginous, tarsi 

 testaceous. Abdomen fusco-ferruginous, shining, margins of segments pale 

 testaceous, but hardly fasciate. Length 7 mm. 



Hub. — Illinois ; six females and three male specimens. The female 

 resembles A. flavo-clypeata iSm. 



Aiidreiia scuiellaris 9 .—Black, pubescence beneath pale ochraceous, 

 above inclining to fulvous, especially on the scutellum and post-scutellum. where 

 it is dense and bright; clypeus shining and impunctate medially, rather closely 

 jiunctured and thinly pubescent laterally ; basal process of labrum subtriangular, 

 broadly rounded at tip; mandibles rufo-piceous at apex ; antenna^, black; meso- 

 notum minutely roughened, almost impunctate, clothed with thin, jiale, fulvous 



