ART. 23 REVISION OF MACEOCENTRUS MUESEBECK 13 



ceous; wings whitish hyaline, veins and stigma brownish, the latter 

 with a pale yellow spot at base. 



Male. — Essentially as in the female except that antennae are a 

 little more slender at apex and the legs a little tinged with piceous ; 

 antennae of allotype 28-segmented. 



Type.—V.S.'^M. No. 43489. 



Type locality. — Garden City, Kans. 



Host. — " Cutworm larva." 



Remarks. — Described from two females and one male reared 

 May 8, 1914, by F. B. Milliken in the Bureau of Entomology under 

 Chittenden No. 2508, and four females collected on wheat at Guy- 

 mon, Okla., April 24, 1930, by W. E. Jackson and C. F. Stiles. The 

 National Museum has 20 additional specimens, which are not in- 

 cluded in the type series, from Colorado (C. F. Baker collection), 

 one from "Wellington, Kans. (E. G. Kelly), and one from McCook, 

 Nebr. This material shows the number of segments in the antennae 

 to range from 25 to 30 ; there is also considerable variation in the ex- 

 tent of the piceous coloring of the thorax, but the pronotum and 

 mesoscutum are usually somewhat paler than the remainder of the 

 thorax. 



2. MACROCENTRUS CRASSIPES, new species 



Exceedingly similar to the European infi'rmus (Nees), as repre- 

 sented by two specimens so determined in the United States National 

 Museum, but apparently differing in the longer calcaria of posterior 

 tibiae, in the slightly more transverse head, and in the nervellus 

 being perpendicular to the mediella. It is possible that the two are 

 identical, but with so little material of either form available I am 

 unable definitely to identify as infirmus the species here described. 



Female. — Length 4.5 mm. Head only a little wider than thorax, 

 vertically short, the face between antennal foramina and clypeus 

 much less than half as long as broad; temples and cheeks rounded, 

 broad ; clypeus strongly convex, elevated anteriorly ; interf oveal line 

 about equal to foveo-ocular line; eyes small, broadly oval, not ex- 

 tending bej^ond the outer li"ne of the temples, and situated low so 

 that vertex is very broad and strongly convex, rising much above 

 the level of upper margins of the eyes; ocelli very small; postocellar 

 line more than twice, the ocell-ocular line more than four times, the 

 diameter of an ocellus ; maxillary palpi short, not longer than height 

 of head, the longest segment shorter than the scape; labial palpi 

 very short, the apical segments but very little longer than broad; 

 face a little punctate medially ; antennae distinctly shorter than the 

 body, 33-segmented, the second segment of flagellum only twice as 

 long as broad ; scape short and stout. 



