NO. 2334. NORTH AMERICAN ICHNEUMON-FLIES— CUSHMAN. 277 



PRISTOMERUS (PRISTOMERUS) LATICEPS, new species. 



Differs from fuscipennis principally as follows: 



Female. — Length, 5 mm.; antennae, 4 mm.; ovipositor, 3 mm. 



Head in front view strongly transverse, seen from above with 

 temples flat and very narrow; inner margins of eyes slightly concavely 

 curved; malar space much narrower than mandible at base; diameter 

 of lateral ocellus nearly twice as long as ocell-ocular line, which is 

 subequal to postocellar line; mesoscutum opaque shagreened but 

 impunctate; thorax laterally and propodeum dorsally very sparsely 

 punctate, subopaque; areola hardly twice as long as wide, costulae 

 at cephalic third; hind femur barely one-fourth as thick as long, 

 tooth long, denticles distinct; nervulus interstitial; second tergit©' 

 distinctly more than twice as long as wide at base, its sides weakly 

 divergent; ovipositor as long as abdomen. 



Head black, apex of clypeus piceous, mandibles yellow; thorax 

 black with only pronotum red; front and middle legs pale testaceous, 

 coxae and trochanters stramineous; liind coxae rufous, piceous within,, 

 trochanters pale, basal joint piceous within, tibia reddish piceous, 

 yellow at apex, tibia and tarsus fuscous, former pale in middle and 

 with calcaria wliitc; wings h^^aline; abdomen entirely piceous except 

 yellowish or whitish margins of all tergites and basal angles of tliird. 



Type locality. — Falls Church, Virginia. 



Type.—Csit. No. 22S62, U.S.N.M. 



Described from two females, the type taken June 7, 1914, by 

 William Middleton, and the paratype at the same locality July 4, 

 1913, by Frederick Knab. 



The paratype is slightly smaller than the type, but otherwise 

 practically identical with it. 



PRISTOMERUS (PRISTOMERUS) OCELLATUS, new species. 



In the female this species is very much like agilis (Cresson), but in 

 male the very large ocelli and strongly divergent eyes render it very 

 distinct from any of the described North American species. 



Female. — Length, 8 mm,; antennae, 5 mm.; ovipositor, 4 mm. 



Head in front view wider than long; face slightly narrower than 

 frons; eyes slightly arcuate opposite antennae, fully a tliird longer 

 than wide; malar space little more than half as long as basal width 

 of mandible; clypeus subtruncate at apex; lateral ocelli closer to- 

 ether than their greatest diameter; pronotum polished; mesoscutum 

 opaque shagreened, rather densely punctate medially, lateral lobes 

 subpolished; scutellum polished; mesopleurum punctate opaque 

 below, polished above, the oblique impression obliquely striate in 

 anterior end; propodeum punctate dorsally and laterally, transversely 

 rugulose posteriorly, areola narrow pentagonal, costulae at anterior 

 third; hind femur stout; tooth large, not far beyond middle, denticles 



