Ag 
quite dark at bases; yellow blotch on dorsum of abdomen, occupying nearly its whole 
surface, leaving only a narrow band of black around the edge; venter the same. 
Male.—Rather smaller than the 9, but agrees otherwise, except that the scape of 
the antennx has a ventral leaf-like expansion; the abdomen is even more rounded 
than in the 2, and the yellow blotch is much smaller. 
Described from 1 6 and 1 2 bred, July 11, 1882, from the larva of 
Platyhypena scabra (F.), District of Columbia. [C. V. R. Coll.| 
46. (4) Buplectrus catocale, n. sp. 
Length, 2.3™"; expanse of wings, 4.3™™"; greatest width of fore wing, 0.7™™ 
Differs from E. comstockii in its larger size, more rounded abdomen, and in the appear- 
ance of the abdominal blotch. This in the ¢ occupies the whole of the anterior half 
of the dorsum of the abdomen, while the venter is entirely yellow except at tip. 
With tie 2 the spot occupies the anterior center of the dorsum of the abdomen, is 
oval in form, and is bounded on all sides by a broad margin of dark brown; th® 
venter is as with the ¢. The metascutellum is finely striated longitudinally. The 
yellow spot on the lower front extends to the base of the antenne, 
Described from 3 3’s and 2 2’s bred, July 5, 1873, from the larva of 
a species of Catocala at Saint Louis, Mo. [C.V.R. Coll.] This species 
has also been bred from a geometrid larva on birch, found at Hyatts- 
ville, Md., July 9, 1882. [Dept. Agr. Coll.] 
47. (5) Euplectrus frontalis, n. sp. 
Female.—Length, 2™™; wing expanse, 4.7™™; greatest width of fore wing, 0.81™™. 
In this species the sculpture of the thorax is more definite than in any other so 
far considered. The pronotum is deeply but sparsely punctuate except at its posterior 
border; the mesoscutum is quite coarsely shagreened, and its median carina is faint; 
the metascutellum is plainly longitudinally striate. The yellow spot of the lower 
front includes the bases of the antenne, but the cheeks below this point are black to 
the bases of the mandibles. In other respects it resembles E. catocale. 
Described from 1 2, bred, September 13, 1882, from an unknown 
noctuid larva on walnut, collected at Arlington, Va. [C. V. R. Coll.] 
Genus HLACHISTUS Spinola. 
Antenne inserted considerably below the middle of the face, flagellum very rarely 
incrassate ; funicle 4-jointed; club 2-jointed. Thorax with a large conico-semiglobose 
pronotum ; mesoscutum short; mesoscutellum with two longitudinal grooves, meet- 
ing at the apex; metanotal median carina acute. Fore wings with the postmarginal 
vein plainly longer than the stigmal; stigmal club small but with an acute uncus. 
Abdomen usually with a short smooth petiole. Posterior tibize l-spurred. Body 
black, immaculate; head always more or less metallic. 
48. (1.) Hlachistus proteoteratis, n. sp. 
Female.—Length, 1.86"™; wing expanse, 3.12™™; greatest width of fore wing 0.53"™. 
Head broadly oval, cheeks well rounded, antennal fosse converging dorsally; the su- 
tures of the mesoscutar parapsides and of the scapul are continuous; the postmargi- 
nal vein is rather longer than the stigmal, which is very straight, with a small club 
and a sharp claw. Face smooth; occiput and top of head near eyes slightly punctu- 
late; pronotum sparsely punctured, except at its smooth posterior border; mesoscu- 
tum transversely shagreened ; mesoscutellum very finely coriaceous; meta and post- 
