AMERICAN HYMENOPTERA. 85 



on apical margins; mesothorax and pleura coarsely punctured; scutellar teeth 

 broad and prominent; apical middle of fifth abdominal segment more finely 

 punctured than remainder of the segment; last ventral segment convex and 

 acuminate at tip. Length .45 inch. 



Hah. — Texas, (Belfrage). One specimen. In the ornamentation 

 of the abdomen this species strongly resembles distincfvs, but other- 

 wise they are widely different. 



Epeolus zacatecns. — 9- — Black; spot surrounding base of each an- 

 tenna, line on upper margin of prothorax, line before scutellura, line on 

 postscutellum, patch on each side of metathorax, posterior margin of tubercles, 

 four posterior coxae and the tibiae exteriorly, silvery-white; large patch on 

 each side of first segment of abdomen, emarginate within, a small patch on 

 each side of second segment and narrow apical margins of segments 2 — 4, 

 white, tinged with yellow ; a whitish spot on each side of fifth segment; wings 

 tinged with fuscous; lateral teeth of scutellum long and subacute; last ventral 

 segment convex, broadly rounded at tip. Length .60 inch. 



Hah. — Mexico, (Sumichrast). One specimen. The pale markings 



of abdomen are almost white. 



Epeolus conoavus. — ?. — Large, robust, deep black; head entirely 

 black; posterior margin of prothorax, broad anterior margin of mesothorax as 

 far back as tegulse, narrow line over tegulse continued round before scutellum, 

 tubercles and spot behind, broad band beneath scutellum, a large bilobed spot 

 on each side of metathorax, broad band on first abdominal segment more or 

 less interrupted medially by a transverse black mark, and apical margin of 

 second, third and fourth segments, that on second broadly dilated laterally, 

 yellowish- white or pale buff; mesothorax and pleura very densely punctured ; 

 lateral teeth of scutellum short and blunt; wings fuscous; apical segment 

 of abdomen sparsely punctured before apex; last ventral segment prolonged 

 beyond dorsal segment, longitudinally concave, the tip produced and slightly 

 incurved. Length .50 — .60 inch. 



Hah. — New Mexico, (Yarrow) ; California, (H. Edwards) ; Georgia, 

 (Ridings) ; Louisiana, (Dr. Lewis). Five specimens. Readily dis- 

 tinguished by the last ventral segment being produced and concave. 

 Very much like 7-emigatus Fab. in ornamentation ; but besides the 

 different shape of the last ventral segment, that of the third sub- 

 marginal cell is also quite different, being, in remigatus, much broader 

 at its -junction with the marginal cell. 



Epeolus robustus. — 9 • — Large, robust, black; sides of face, above an- 

 tennae and posterior margin of head, fulvous; upper margin of prothorax, broad 

 anterior margin of mesothorax, continued narrowly on the sides and before 

 scutellum, patch beneath tegulae covering the tubercles, narrow posterior margin 

 of scutellum, postscutellum, triangular patch on each side of metathorax, spot 

 on four posterior coxae, tibiae and tarsi exteriorly, first segment of abdomen 

 above, (narrowly interrupted medially and squarely emarginate within, form- 

 ing a broad transverse black line), broad apical margin of segments 2 — 4, that 



