102 HYMENOPTERA. 



PROSOPIS BASALIS Sin., 1853. 



1853. P. basalts, male, female. Sm. Cat. Hym. Brit. Mus. 22 : 23. 

 1869. P basalis, Cr. Proc. Bos. Soc. Nat. Hist. 12:269. 



1882. P. basalis, Prov. Nat. Can. 13:258. 



1883. P. basalis, Prov. Faun. Ent. Can. Hym. 1 : 726. 

 1890. P. basalis, Ckll. Can. Ent. 22:39. 



1890. P. basalis, Ckll. Bull. Colo. Biol. Assn. 1 :31. 

 1894. P. basalis. Harrington. Can. Ent. 26:14. 

 1896. P. basalis, Evans. Can. Ent. 28:12. 

 1896. P. basalis, Ckll. Psyche Supp. 7:26. 

 1901. P. basalis, Lov. Ent. News. 12:4,7. 

 1901. P. basa/is, CkW. Psyche. 9:283. 



1903. P. basalis, CkU. Psyche. 10:74. 



1904. P. basalis, Vier. Can. Ent. 36:93. 



1906. P. basalis, Ckll. Bull. Am. Mus. Nat. Hist. 22:423. 

 1910. P. basalis, Lov. Psyche. 17 ; 185. 



Male. — Easily known by its large size, enormous " heart shaped" 

 scape, peculiar marks, heavy punctures, etc. 



Length about 9 mm. Head broad, large ; scape enormously swollen, 

 flattened, almost circular in outline, covering face above antennal 

 sockets; clypeus short, broad as long, very narrow at base; lateral 

 areas very broad ; supraclypeal area extremely narrow and long ; an- 

 tennal sockets placed very close together, (fig. 92). Thorax and ab- 

 domen stout, the former comparatively heavily haired, with rather long 

 white pubescence, the latter with apical bands on first two segments. 

 Propodeum short, slanting, superior face not longer than metanotum ; 

 posterior face large, margins not rounded. 



Sculpture. — Front, vertex, occiput, pronotum, mesonotum, and 

 pleura densely, but not coarsely punctured ; metanotum rugulose ; 

 enclosure of propodeum small, narrow, bowl very short and narrow, 

 neck long; surface of bowl rugose, not pitted ; remainder of propo- 

 deum rugulose. Abdomen ; dorsum heavily punctured, first segment 

 more sparely than remainder ; venter slightly punctured. 



Yellow Markings. — Lateral face marks very broad, filling lateral 

 areas, and narrowing to eye margin above ; supraclypeal mark filling 

 supraclypeal area below antennal sockets, and extending above in a 

 very narrow, pointed process. Scape with lateral half orange or yellow 

 (fig. 92). Thorax entirely dark. Legs with anterior tibiee in front, 

 middle and hind tibiae at base, and middle and hind basitarsi yellow. 



Genitalia. — Armature entirely diS'erent from that of any other spe- 

 cies. Stipes long, broadening apically, ending abruptly, not in a 

 rounded apex as usual, but flat, with a membrane connecting the edges 

 like a drum head, fringed with long hairs ; superior lobe very small, 

 corresponding to a similar inferior lobe; sagittal rods poorly de- 

 veloped, largely membranous, short ; volsella, moderate in size, (fig. 



