28 AMERICAN ENTOMOLOGY. 



a fuscous or blackish spot above, and a line on the lateral edge ; 

 the dorsal spots of the posterior segments are extended into 

 bands : venter blackish on the terminal joints. 



Ohs. This species, as well as the alhicornis, belongs to Mei- 

 gen's first division of the genus, in which the palpi are elongate- 

 conic, and incumbent on the proboscis. It resembles the albi- 

 cornis, but the wings are immaculate, &c. 



The lower left figure. 



Leptis fasciata. — Specific character. Velvet-black ; thorax 

 with golden-yellow hair ; tergum fasciate with white ; wings hya- 

 line with a large brown stigma. 



Leptis fasciata nobis, Journ. Acad. Nat. Sci., vol. iii.p. 37. 



Dene. The fundamental color of the thorax is the same with 

 that of the other parts of the body ; hypostoma in a particular 

 light cinereous ; pleura and pectus dark lurid ; poisers fuscous, 

 scapus whitish ; wing nervures brown, stigma rather large, brown 

 and distinct ; tergum on the posterior margin of each segment 

 banded with yellowish ; venter immaculate ; feet whitish, thighs 

 reddish-brown towards their bases, tarsi dusky at tip. 



Ohs. Inhabits Pennsylvania. The nervures of the wings are 

 arranged as in Meigen's second division, and the insect has 

 much the appearance in miniature of L. thoracica of Fabricius. 



The lower right figure. 



[Belongs to the genus Olirysopila Macq. — Sacken.] 



BERYTUS. Plate XIV. 



Generic character. Antenna? four-jointed, filiform, elongated, 

 geniculated in the middle, inserted above a line drawn from the 

 eyes to the base of the lab rum; first joint very long, clavate at 

 tip ; second and third joints intimately connected so as to appear 

 as one ; last joint short and oval ; body filiform ; feet elongated, 

 thighs clavate. 



Ohs. This is one of the many genera that have been very 

 properly separated from the Linnaean Chnex by Fabricius under 

 the name I have adopted, and under that of Neides by Latreille. 

 It is very distinct in appearance from either of its neighboring 

 genera, and is remarkable for its slender form of body and limbs. 



Berytus spinosus. — Specific character. Obscure reddish- 

 brown ; terminal joint of the antennae fuscous; thorax punc- 

 tured ; a strong spine before the posterior feet. 



