182 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 56. 



the submarginal vein, and an oblique double row or band of similar 

 cilia originating at the bend of the submarginal vein, the speculum 

 indistinct; stigmal vein forming a right angle with the postmarginal 

 vein, and originating distmctly before the submarginal reaches the 

 costal margin; postmarginal vein short and thick at base. Abdomen 

 about two-thirds as long as the thorax, the base broad, the sides 

 nearly parallel, and the apex subtruncate; tactUe plates situated 

 but little beyond the middle; the ovipositor barely protruded. Head 

 microscopically and alutaceously punctulate, the frontovertex without 

 pin-punctures, the postorbital region and occiput nearly smooth; 

 mesoscutum very finely reticulate, the axillae and scutellum more 

 coarsely scaly-reticulate, but the reticulations hardly more deeply 

 impressed than on the scutum; the first tergite of abdomen with the 

 reticulations nearly uniform but fading out across the base, otherwise 

 as in niger. Pubescence of head very fine and inconspicuous, that of 

 mesoscutum coarser, white and rather prominent but much less so 

 than in niger; the scutellum with only a few, hardly visible, dark- 

 colored hairs; the metapleura and hind coxae with the usual, dense, 

 appressed pubescence. Length of body, (1.77 to 2.11); length of 

 head, 0.73; width of head, 0.75; width of vertex, 0.226; length of eye, 

 0.53 ; width of eye, 0.38; length of antenna, 1.11 ; width of mesoscutum, 

 0.78; length of forewing, 1.94; width of forewing, 0.81; exerted part 

 of ovipositor, 0.06 mm. 



General color strontian yellow (R.) but the head often more pri- 

 muline yellow (R.), the posterior part of mesopleura a little brownish; 

 center of occiput, pronotum except a narrov/ band along the posterior 

 margin, a lenticular mark on the anterior half of mesoscutum, the 

 axillae, most of scutellum except the apex and often a pale yellowish 

 spot low down on the sides just before the middle, metanotum, 

 propodeum, and most of the dorsum of abdomen except across the 

 base, and a spot on each side just behind the tactile plates black or 

 blackish; most of venter brownish except at base and with a blackish 

 spot on each side near the middle, the exposed part of ovipositor 

 yellowish; tegulae pale yellowish white, with the apical margin broadly 

 brownish. Scape and pedicel uncolorous with face, the funicle pale 

 brown and the club a little darker. Legs strontian yellow, the upper, 

 inner margin of the hind femora on the apical half, the Icnee joint, 

 a broad annulus just beyond the middle and a narrower one near 

 base of the hind tibiae, and the last joint of all tarsi brownish black. 

 Wings entirely hyaline except for a small brownish area along the 

 lower margin of the stigmal vein, which is hardly wider than the vein 

 itself. 



Male. — Enthely similar to the female, but the abdomen is a little 

 smaller, more ovate in shape, and the black spot on each side of venter 

 is nearly absent. Length, 1.66 to 1.85 mm. 



