48o CONNECTICUT GEOL. AND NAT. HIST. SURVEY. [Bull. 



length from the first to the sixth, club obliquely acuminate, scape 

 light yellow-brown in color, flagel brown, with the club lighter in 

 color than the rest of the flagel ; pubescence shorter and finer. 



Male: average length 1.90 mm.; antennae filiform, distinctly 

 pilose, joints of the funicle subequal in width, decreasing slightly 

 in length from the first to the sixth, first joint a little more than 

 twice as long as broad, club nearly as long as the two preceding 

 funicular joints together, ovate, flattened laterally and acuminate 

 at tip; head densely and rather finely punctate, black, with a 

 metallic bluish green reflection ; scape yellowish, pedicel and flagel 

 brown to blackish ; thorax mostly concolorous with the head, and 

 similarly punctate, the scutel and metanotum with the punctures 

 finer than those on the head, pronotum, and mesonotum, those on 

 metanotum deeper, metanotum with an indication of a median 

 carina ; hind tibiae with a single apical spur, hind trochanter with 

 two tooth-like projections beneath; all coxae black with metallic 

 reflections, all femora black or dark brown with yellowish tips, 

 all tibiae and tarsi honey-yellow; wings hyaline, fheir veins very 

 distinct and dark brown ; abdomen oval, convex above, flattened 

 beneath, glabrous but very finely shagreened, mostly black, with 

 a yellowish spot above and beneath at base. 



Parasitic on the Hessian fly. Listed as an American parasite 

 of a cosmopolitan insect. 



°M. subapterus (Riley). Homopterus subaptertis Riley. 



Female: length 1.8-2.8 mm. ; differs from the male as follows: 

 antennae more clavate, sixth funicular joint slightly broader than 

 long, flagel always black with a metallic tinge, pedicel usually 

 tipped with black at its distal end; pubescence shorter and finer 

 than in the male ; femora and tibiae in general of a darker brown, 

 in which case the knees and distal third of tibiae are whitish; 

 metallic luster of thorax more subdued; wings, when present, 

 hyaline, veins faintly tinged with yellowish, spurious veins very 

 faint; abdomen notched when seen from the side. 



Male: wingless; length 1.58-2.74 mm.; antennae inserted a 

 little below the middle of the face and close together, but still 

 distinctly separated, flagel pilose, its club oval-acuminate, flattened 

 laterally, funicular joints subequal in length, first joint a trifle 

 longer than broad, the following joints increasing in width to 

 the sixth, which is as wide as long ; posterior ocelli nearer to the 



