78 PROCEEDINGS OF THE RATIOS A L MVHEVM. vol.40. 



first tranverse cubitus. Eyes, ocelli, apices of mandibles, and an- 

 tennae black; wing veins and stigma dark brown; all tarsi and the 

 hind tibiae dark brown; remainder of body reddish stramineous. 



TV^'^.— Cat. No. 19360, U.S.N.M. 



Described from a single specimen labeled Ames, Iowa, without 

 further data. 



OPIUS CRASSICEPS, new species. 

 Plate 34, fig. 3; plate 35, fig. 2. ■ 



Female. — Length 3.5 mm. Head transverse, smooth, more than 

 usually thick antero-posteriorly; posterior orbits broad and only 

 slightly receding, not as broad as the eyes; face impunctate or nearly 

 so, the median ridge very slight and not reaching to the clypeus; 

 eyes short oval; malar space equal to about two-thirds the width of 

 a mandible at base; clypeus about three times as wide as long down 

 the middle, the anterior margin rounded; opening between mandibles 

 and clypeus broad; antennae 43-jointed, the first flagellar joint about 

 three times as long as thick and scarcely longer than the second; ocell- 

 ocular line equal to nearly three times the diameter of an ocellus ; thorax 

 smooth; parapsidal grooves effaced except at the lateral anterior angles 

 of the mesoscutum; mesopleurae, smooth without an impression below 

 the middle ; propodeum rugose. Forewing with the first radial abscissa 

 equal to about half the width of stigma, the second abscissa more than 

 one and one-half times the length of the first transverse cubitus; re- 

 current nervure interstitial; second cubical cell much narrower at 

 apex than at base; stigma not broad. First abdominal tergite rugose, 

 the following segments smooth; ovipositor exserted a little less than 

 half the length of the abdomen. Head and thorax black, mandibles 

 rufous with their apices black; scape rufous, flagellum black; sides of 

 prothorax, legs including coxae, and the whole abdomen rufo-strami- 

 neous; ovipositor sheaths black; wings hyaline, veins and stigma 

 dark brown. 



Type-locality. — Colorado. 



Type.— C^i. No. 19361, U.S.N.M. 



Two specimens without further data. 



OPmS ASHMEADI Dalle Torre. 



Opius annulicornis Ashmead, Journ. Linn. Soc. Lond. Zool., vol. 25, 1894, p. 136 



(not Thomson). 

 Opms ashmeadii Dalle Torre, Catalog. Hymenop., vol. 4, 1898, p. 59. 



Habitat. — St. Vincent. 

 Host. — Unknown. 



OPIUS CINCTICORNIS, new speclOB. 



Female. — Length 2.3 mm. Head a little more than twice as wide 

 as long antero-posteriorly, smooth except the face, which is faintly 

 Avrinkled; face with a sharp median ridge; posterior orbits about. 



