no. 1812. NEW ICHNEUMON FLIES— VIERECK. 183 



essentially as follows : Color very as in Microbracon howardi Viereck, 

 but tinged with testaceous and with yellowish stramineous color 

 replacing the yellow, wings transparent tinged with brownish, 

 stigma and costal vein brownish, other veins stramineous tinged 

 with brown; third, fourth, and fifth tergal segments partly brownish 

 laterally. 



Male.— Similar to the opposite sex but with the dark regions mostly 

 blackish. 



Type.— Cat. No. 13494, U.S.N.M. 



Type-locality. — "Busi, just inland from Beira, Mozambique." 

 Portuguese East Africa, "From a maize storehouse." Presumably 

 parasitic on one of the Coleopterous that feed upon maize. In a 

 series of specimens the darkening of the third, fourth, and fifth tergal 

 segments is seen to be sometimes quite extensive, again wanting or 

 almost wanting, at least on the third segment. The first tergal seg- 

 ment, on the other hand, is apparently always yellowish or whitish 

 yellow. 



HORMIOPTERUS GRACILIFORMUS, new species. 



Related to H. fasciatus Ashmead, compared with the type of which 

 it differs as follows: 



Female. — Scarcely 2.5 mm. long; exserted portion of sheaths of 

 ovipositor approximately 0.5 mm. long. Tergum hardly striate, first 

 tergal segment virtually simple and rounded off at base except for 

 the rudimentary dorsal and lateral carina?, the latter obliquely 

 extending backward and downward, attaining the lower edge of the 

 first tergal segment at a point about one-fourth the length of the 

 lower edge from the base of the segment; in both species the metano- 

 tum (postscutel) as seen from the side of the specimen is produced 

 into a low thorn-like process with the apex pointed toward the 

 propodeum. 



Male. — Similar to the female. 



Type.— Cat. No. 13500, U.S.N.M. 



Type-locality. — Wellington, Kansas. 



Received from U. S. Department of Agriculture, Bureau of Ento- 

 mology, under Webster Nos. 5473, cage 119; 5472, cage 330; 6515, 

 cage 497; 5476, cage 294; 5473, cage 300; 5422, cage 121; T. H. 

 Parks collector; reared from an eurytomid in Agropyron. 



MACROCENTRUS (AMICROPLUS) CRAMBIVORUS, new species. 



Female. — Length, 3 mm.; sheath of the ovipositor 4 mm. long. 

 Head black, mouth and palpi stramineous, infuscated; scape, pedicel 

 and first joint of flagel dark stramineous, rest of antenna? brownish 

 to blackish; antenna? 34-jointed; thorax, coxa? and trochanters 

 stramineous, rest of legs rather brownish stramineous, claws black; 

 middle lobe of dorsulum hardly higher than the lateral lobes, notauli 



