AMERICAN HYMENOPTERA. Ill 



red; antennae red at base, becoming black towards their apex ; face 

 with a slight silky cinereous pile; nietathorax, coxae and femora with 

 a slight cinereous pile; wings fusco-hyaline, with a faint violet irides- 

 cence; apical joints of tarsi dusky; abdomen smooth and shining." 

 Hah. — "Mexico." Not seen. 



Subgenus PRIOCNEMIS. 

 This subgenus is characterized by the intermediate and posterior ti- 

 biae being serrated ( 9 Fig. 7, &.) or serrulated ( S ), and by the ante- 

 Figure 7. rior legs not being ciliated with spines 

 *• '*• (Fig. 7, f). The neuration of the anterior 

 '^ i _^^,-c^--— T--^ wings is variable in different species, but 

 /| ^^^^^^^^y^j^J generally quite constant in individuals of 

 [l ^"~- — Hi— =="— — ^ the same species ; the marginal cell is gene- 



^%, „ rally Ion";, narrow and more or less acute 



% y ^"^"^^^ at tip, but in several species the tip is more 



^ \ or less obtuse or rounded (as in Fig. 7, a); 



the shape of the submarginal cells is vari- 

 able in different species, and appear to be a good specific distinctive 

 character; the basal series of transverse nervures is widely dislocated 

 in all the species known to me, except in alienafAis and pulchellus. 

 The specific characters are well marked, and therefore the species are 

 easily separated. 



(From the United States). 

 58. Pompilus (Priocnemis) magnus, n. sp. 



Feviale. — Lai'ge, robust, deep black, head and thorax opaque, abdo- 

 men subopaque; face and cheeks clothed with rather long pubescence; 

 anterior margin of the clypeus arcuate, labrum and palpi fuscous ; an- 

 tennae about as long as the head and thorax, orange-yellow, the two 

 basal joints black ; the breast and anterior coxae clothed with long 

 black pubescence; posterior margin of the prothorax angular; meta- 

 thorax smooth and rounded, without any impressed line ; wings black, 

 violaceous; marginal cell long and narrow, the tip oblique; second 

 submarginal obliquely-quadrate, narrower than the third which is nar- 

 rowed towards the marginal, the second recurrent nervure much bent 

 outwardly about the middle ; legs stout, black, somewhat shining, tarsi 

 brownish at tips; abdomen ovate, convex, apical segment covered with 

 brownish hairs. Length 13 lines. 



Hah. — Georgia, (Coll. Am. Ent. 80c.) 



One 9 specimen. This is the largest and one of the finest species 

 of Priocnemis known to me. 



