44O ENTOMOLOGICAL NEWS. [Dec., 'l6 



Say's original description is given here : 



"Black; wings hyaline; sides with fulvous hair; tergum banded. 



Inhabits Pennsylvania and Maryland. 



Hypostoma and occipital orbits with white hair ; stethidium with ful- 

 vous hair, particularly on the sides of the thorax, on the pleura and 

 collar ; wings as far as the basal transverse nervure fuscous, costal 

 nervures fuscous, the included areola yellowish-brown ; feet, the hair 

 with a whitish reflection ; tergum with a band of prostrate yellowish 

 hair at the base of each segment, and with long fulvous hair each side 

 as far as the middle of the length. Length nearly one-fourth of an 

 inch. It belongs to Wiedemann's fifth tribe." 



This species I have based upon the presence of the long scales 

 on the lateral margins of the abdominal segments three to sev- 

 en. There may be much variation in some of the other char- 

 acters. I associate Say's name with this form on account of 

 the smaller average size, the presence of "yellow prostrate 



hair on the bases of each segment the long fulvous hair 



on each side as far as middle of the length" of the abdomen. 



The species may be described as follows : 



Description. Black, halteres yellow. Pile black on frons, face in 

 part, first antennal joint, mesonotum, dorsum of scutellum and abdo- 

 men, and apical ventral segments; white on: face, pleura in part, pec- 

 tus and basal ventral segments ; golden yellow on : anterior and lateral 

 mesonotal margins, prothorax, notopleura, meso- and meta-pleura, and 

 lateral margins of abdominal segments i to 2. Tomentum black on : 

 base of scutellum, apices of abdominal segments i to 8, bases of 5 to 7, 

 and antecostal cell ; white on : face, occiput, pectus, venter and legs ; 

 golden-yellow on : frons, lateral and posterior mesonotal margins, 

 scutellar margin, lateral margins of abdominal segments I to 2, bases of 

 2 to 4, subapical bands of 5 to 7; bronze, sparsely, on disc of mesono- 

 tum and scutellum. Lateral margins of abdominal segments 3 to 7 with 

 long cuneate scales intermixed with pile ; those of 3, 5 and 6 are 

 black, of 4 and 7 are white. Seventh of male with silvery scales. 



Wings hyaline with humeral, subcostal, sometimes costal and first 

 basal cells infuscate. 



Bristles of mesonotum yellow, of scutellum and legs black. Hind 

 legs not ciliate with scales. 



Head hemispherical. Frons about twice as broad at antennae as at 

 vertex. Face convex or epistoma slightly prominent. Post-orbital 

 emargination distinct. Proboscis not protruding. First and second an- 

 tennal joints subequal; third with styliform apex as long as remainder 



