348 Trans. Acad. Sci. of St. Louis. 



Heriades denticulata Schletterer, Zool. Jahrb. Syst. IV, 687, tf, 1889. 

 (Dalla Torre.) 



Eriades dentieulatus Dalla Torre, Cat. Hym. X, 375, 1896. 



Osmia bucconis Dalla Torre, Cat. Hym. X, 388, 1896. 



$>. — Black, closely and coarsely punctured, the punctured 

 a little more separated above; pubescence whitish, short and 

 thin above, more dense on last two segments of abdomen, 

 longer and more dense on sides of the face, cheeks, tubercles 

 and mesothorax in front, posterior edge of scutellum and 

 sides of metathorax ; head as large as thorax; strongly pro- 

 duced behind eyes so that the ocelli are nearer insertion of 

 antennae than the edge of the vertex; mandibles stout, with 

 a patch of glittering fulvous hairs at tip; clypeus appearing 

 truncate, slightly notched on each side of middle, which is 

 slightly depressed ; antennae short, black ; middle of vertex 

 with a shining impunctate space which is irregular ; tegulae 

 piceus, with a line of white pubescence above; wings hyaline, 

 nervures blackish, second submarginal cell longer than first, 

 receiving first recurrent nervure about one-third from base, 

 the second near the tip ; matathorax above with a transverse 

 space which is smooth, shining and impunctate; legs with 

 thin whitish pubescence, except on tarsi beneath where it is 

 yellowish ; abdomen with the basal segments more shining 

 and more sparsely and finely punctured on the disc; basal 

 segment rather broadly and deeply excavated, segments 1-4 

 with fasciae of white pubescence, wider on sides of first, hairs 

 on tergum short and pale though appearing blackish, ventral 

 scopa fulvous. Length 8-9 mm. 



Carlinville, Illinois; two $ specimens; Ind. (Say), Can. ? 

 (Prov.), Col., Nev., Tex. (Cress.). 



Heriades florid anus $. 



Black, rather coarsely and closely punctured, more shining 

 and more sparsely punctured on vertex, mesonotum and discs 

 of abdominal segments; pubescence white, most evident on 

 middle and sides of face, mesonotum in front, scutellum 

 behind, edges of pleura and metathorax, line over tegulae, 

 legs, and two apical segments of abdomen ; head as wide as 

 thorax and nearly as large, clypeus bare in the middle, closely 

 punctured, apex widely emarginate, presenting two dentiform 



