102 E. T. CRESSON. 



mark on each side of mesothorax in front of wings, spot on tip of scutellum, 

 tegulse, a spot before and beneath, and the pleura beneath between the fonr 

 anterior coxae, all white; metathorax indistinctly sculptured, without elevated 

 lines; wings hyaline, iridescent, nervures black, stigma brown, areolet want- 

 ing ; legs slender, pale honey-yellow, four anterior coxse and trochanters white, 

 posterior trochanters and femora above, tips of their tibife and their tarsi, 

 black, tibial spurs whitish; abdomen long, petiolated, clavate, subdepressed, 

 shining, finely pubescent at tip, first segment long, much dilated at tip, the 

 stigmatic tubercles prominent and placed at the middle, extreme lateral and 

 apical margins, more or less, of the third and following segments white; be- 

 neath whitish, spotted with black. Length 3J — 5 lines. 



^a6.— Connecticut, (Norton); West Virginia. (Ridings.) Two % speci- 

 mens. 



M ? muliebris. — %. Very long and slender, shining, subpubescent; head 

 broad, transverse, black, eyes very large and prominent, anterior orbits, face, 

 clypeus, cheeks beneath, mandibles except tips, and the palpi white; antennae 

 about as long as the body, slender throughout, brown, pale at base, scape white 

 beneath, basal joints of flagellum long; prothorax white, its posterior margin 

 more or less black; mesothorax black, strongly trilobed, the middle lobe promi- 

 nent Avith a more or less distinct, white spot on each side anteriorly, a large 

 pale luteous spot on the disk, between the wings; scutellum and postscutellum 

 white, the space on each side blackish ; metathorax small, feebly sculptured, 

 shining, black, a broad lateral stripe and a median spot, pale luteous; pleura 

 white with a transverse black spot beneath the wings ; tegulse and a spot beneath 

 also white; wings hyaline, beautifully iridescent, nervures and stigma black, 

 areolet triangular,. slightly oblique in one specimen; legs slender, whitish, the 

 femora more or less tinged with yellow, the posterior coxae at tips, their tro- 

 chanters above, tips of their femora, and their tibiae and tarsi more or less 

 dusky ; abdomen long, petiolated, subdepressed, subopaque, the basal segment 

 long, moderately slender, scarcely dilated at tip, with the stigmatic tubercles 

 prominent, and placed before the middle, remainder of abdomen subparallel, 

 only slightly and very gradually dilated towards the apex; black, spot on tip 

 of first segment, the basal and apical margins of the five following segments, 

 and the apical segment entirely, white, beneath pale, banded with blackish. 

 Length 4 lines. 



Hub. — West Virginia. (Ridings.) Two '^ specimens. A handsome species, 

 with a remarkably slender form, the abdomen being double the length of the 

 head and thorax. 



HLf peregrinus. — J. Black, shining, subpubescent; head large, between 

 quadrate and subglobose, pubescent, face silvery, mandibles white in middle* 

 palpi white; antennae black, brownish at base and apex; prothorax, mesothorax 

 and scutellum ferruginous, the central lobe of mesothorax black : metathorax 

 shining, pubescent, with well-defined elevated lines, forming on the disk an 

 elongate area; tegulse white; wings hyaline, iridescent, areolet rather small, 

 5-angular, the second recurrent nervure rounded outwardly ; legs very slender, 

 the two anterior pairs entirely whitish, except their tarsi which are dusky, 

 the posterior pair brown-black, their coxae and trochanters fulvous; abdomen 

 long, slender petiolated, subcompressed at tip, first segment long and slender, 

 subcylindric, scarcely dilated at tip, slightly arcuated, stigmatic tubercles dis- 



