NO. 1487. NORTH AMERICAN DIGGER WASPS— FERNALI). 409 



the mesocoxa extending upward toward the other; remainder or the 

 surface of the nieso- and metapleura bhick, finely punctured, and quite 

 thickly covered with rather long, whitish hairs, longest below and just 

 under the base of the hind wing; petiole short, straight, black, with 

 numerous long, whitish hairs, and apparently with a tinge of dull 

 ferruginous above, close to its junction with the abdomen; the length 

 of the petiole about four-fifths that of the second hind tarsal segment. 



Ahdonit')). — Black with a bluish reflection; rather slender and about 

 equally pointed at both ends; the tirst dorsal plate coarsely grayish 

 sericeous and with numerous moderately long, whitish hairs; the other 

 dorsal plates very slightly sericeous but glistening, and with numer- 

 ous fine punctures; the sixth, seventh, and eighth plates more coarsely 

 punctured, and with coarser black hairs, closer together at the sides; 

 terminal plate evenly rounded behind; the posterior margins of the 

 two preceding plates slightly emarginate; beneath, black, glistening, 

 with a slight blui.sh reflection; with scattered, fine punctures and 

 black hairs; on the first plate, just at the junction of the petiole and 

 al)domen, is a short, median ridge; the sixth plate is narrowest, 

 broadly, slightly emarginate behind; seventh plate emarginate behind, 

 with a number of erect, .short, black hairs on the lateral margin, not 

 quite dense enough to form a tuft; eighth plate quite thickly covered 

 with very short, grayish hairs, its hinder margin a little nearer to 

 being pointed than rounded; in .some lights a lesser amount of hairs 

 along the median line gives the appearance of a faint, median ridge, 

 not really present. 



WingKi. — Semihyaline except on the outer margin and along the 

 veins where the}" are fuliginous with a faint, violet reflection; radial 

 cell of the forewing somewhat fuliginous; transverse median vein of 

 the hind wing slightly arched, forming very little less than a right 

 angle with the median; discoidal vein not quite interstitial; cul)ital 

 and radial veins well dev^eloped beyond the transverse cubital vein; 

 tegula^ black, slightly sericeous near the middle, and with fine, scat- 

 tered punctures. 



Legs. — Black; fore coxpe sparsely silvery-white pubescent anteriorly, 

 and with many long, gray hairs; the other cox{\3, the trochanters and 

 the femora grayish sericeous and with many quite long, grayish hairs; 

 tibije slightly grayi.sh sericeous, the hind pair longer than the femora, 

 the others shorter; hind tibiaj strongly brown sericeous behind; their 

 inner contour straight; tarsi grayish to brownish sericeous. 



Lengtli. — Males, 19 mm. (one specimen); Kohl gives 24 mm. 



I have seen but one specimen o"^ this species, taken in Santo Domingo. 

 Other captures were from Mexico (Orizaba). It .seems to be rare. 

 The specimen I have seen is in the collection of the American Ento- 

 mological Society and bore a label in Cresson's handwriting, which 

 indicated that he thought it might l)e the male of his mandibularis^ an 

 idea which may prove to be correct. 



