540 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.53. 



fully a third wider than length of the rather small eyes, slightly ele- 

 vated in middle, weakly punctate; clypeus weakly separated from 

 face, about two-thirds as long as wide, weakly rounded at apex; 

 malar space about as long as basal width of mandible; ocelli very 

 small, barely more than half as long as ocell-ocular line, which is but 

 little shorter than postocellar line; antennae (broken). Thorax 

 rather stout, about half as deep as long, the propodeum strongly 

 arched and extending about a third of the way over the coxae; 

 clothed with short white pubescence, sculpture rather weak; notauli 

 nearly obsolete; scutellum strongly convex, narrowly rounded at 

 apex, and with lateral carinae weak; propodeal carinac fairly strong, 

 areola and petiolar area separated and about equal in length, the 

 latter transversely rugulose and other areas punctate; stigma about 

 half as broad as long, radius arising distinctly beyond middle; second 

 discoidal cell about a third as wide at base as at apex; legs slender, hind 

 basitarsus about three-fourths as long as tibia and slightly shorter 

 than remaining tarsal joints. Abdomen about one and one-half 

 times as long as basal width, sides gently divergent, weakly longitu- 

 dinally striate; first two tergites together slightly longer than rest 

 of abdomen; ovipositor slightly more than twice as long as first 

 tergite. 



Black; mandibles, clypeus at apex and orbits (narrowly) piceous, 

 the last broadly interrupted below and narrowly so above eyes; an- 

 tennae black, piceous below toward base; tegulae piceous; legs red- 

 dish testaceous, hind coxae entirely and middle coxae at base black, 

 hind tibiae apically and their tarsi fuscous; wings hyaline, venation 

 brownish; abdomen black, obscurely reddish in the middle. 



Male. — ^Length 6 mm., antennae 5 mm. Differs from the female 

 in having the eyes and ocelli somewhat larger, the former only slightly 

 shorter than the width of face, and the latter nearly as long as ocell- 

 ocular line, which is about half as long as postocellar line; malar space 

 narrower than basal width of mandible; the piceous color of head and 

 tegulae is replaced by yellov/, and the legs are somewhat paler. 



Host. — MordeUistena morula LeConte. 



Type-locality. — Colorado. 



Type.— Cat. No. 20273, U.S.N.M. 



Described from one female reared from the host July 9, 1891, and 

 labeled "Ac. Cat. 78" and four males from the same State without 

 host records. 



CREMASTUS (ZALEPTOPYGUS) INCOMPLETUS (Provancher). 



Mesolcptus incovipletus Provancher, Nat. Can., vol. 7, 1875, p. 270. 

 Atractodcs fusiformis Provancher, Nat. Can., vol. 7, 1875, p. 335. 

 Cremastus fusiformis Provancher, Faun. Can., Hym., 1883, pp. 376 and 788. 



Described originally in the genus Mesoleptus, this species was rede- 

 scribrd by Provancher later in the same year as Atractodes fusiformis. 



