3i6 Journal of Agricultural Research voi.x.No.e 



and covered with numerous short black hairs; ocelli pale yellow; ocellar bristles 

 large and directed obliquely forward; below lunule to base of antennae dull clay 

 yellow; first joint of antennae clay -yellow, second and third joints dull reddish brown, 

 second joint with a light reflection on upper edge and the third joint rounded, only 

 slightly wider than long, blackish on upper edge; arista nearly black, thickened at 

 base, brownish above thickened portion; pubescence of antennae indistinct; arista 

 nearly twice as long as upper orbital bristle; center of face opaque black, keel indis- 

 tinct, a narrow area on each side of face, extending from base of antennae to cheeks, 

 dull dark red; opaque black of frons extending down around eye in a narrov/ area; 

 across lower part of face, along oral margin, an arcuate, dull clay-yellow band with 

 the pointed ends extending down along the oral margin (narrower in female) ; ridge 

 along sides of oral margin black; vibrissae distinct; cheeks dull black; proboscis and 

 palpi black, palpi with several bristles; dorsum of thorax black, subshining, with a 

 faint grayish appearance and thickly covered with bristly hairs; four dorsocentrals ; 

 the pair of bristles between last pair of dorsocentrals about three-foiu-ths as large as the 

 latter; pleura concolorous; scutellum bare, concolorous, with two pairs of marginal 

 macrochsetae, apical pair decussate; stem of hal teres yellowish brown, knobs nearly 

 white; abdomen concolorous, covered with numerous hairs; marginal bristles dis- 

 tinct; hypopygium of male dull yellowish brown, darker toward apex; legs black, 

 knees and trochanters yellowish; middle tibiae bearing several distinct bristles on 

 posterior side near middle; wings hyalin, veins yellowish brown, costal vein and 

 apex of first vein dark brown; costal vein reaching fourth vein; first costal division 

 about three-fourths as long as second; inner cross vein slightly before apex of first vein; 

 outer cross vein slightly more than its own length from the inner crossvein; last section 

 of fifth vein distinctly longer than penultimate section; veins 3 and 4 slightly diver- 

 gent at apices. 



Reared by the writer at the Eastern Field Station of the Forest Insect Investiga- 

 tions, Bureau of Entomology, at Falls Church, Virginia. 



Length, male, 4 mm.; female, 4.5 mm. 



Type locauty. — Falls Church, Va. 



Type. — Female. Catalogue No. 21062, United States National Museum. 



Allotype . — Male . 



The male of this species has two distinctly abnormal bristles on the head, one in 

 front of the postvertical pair and the other in the right fronto-orbital row. 



The larva (PI. 48, A) is opaque white, cylindrical, and tapering very slightly at 

 extreme anterior and posterior ends. Head segment small and not retractile. Above 

 the hooklet and attached to it is a small, fleshy, conical portion. On each side of this 

 conical portion, near the apex, is a small, black, chitinous, transverse plate with two 

 small, black, cylindrical, chitinous pieces between and perpendicular to these two 

 transverse plates. The hooklet complete (cephalopharyngeal skeleton) is shown in 

 Plate 48, A, a. It is divided into two parts. The apical portion is black and highly 

 chitinized and the greater part of it is exposed. The upper portion extends forward 

 in the form of a large, robust, clawlike tooth; below this are two smaller teeth extend- 

 ing obliquely forward. The tooth on the right side of the larva is smaller than that 

 on the left. The bottom terminates in a sharp toothlike point above which are 

 attached two narrow, brownish, chitinous bands extending slightly below the bottom 

 point. Just above the lower end of, and attached to the band, is a small, blacker 

 chitinous piece. These bands appear to afford muscle attachment for operating the 

 hooklet. The back terminates in a short, stout, oblique point where it articulates 

 with the basal portion. On each side and in front of this rear point is attached a 

 brownish black chitinous plate which is nearly quadrate and is attached along its 

 anterior edge. This plate resembles an eye in the larva. The basal portion of the 

 hooklet has a rather peculiar construction and is quite elongate and flattened. The 



