-n. 2095. THE BliAVONID SUBFAMJLY OPIINAE—GAUAN. 91 



OPIUS AMERICANUS, new species. 



Male. — Length 2 mm. Head transverse, smooth, the face with a 

 median ridge and nearly impunctate; clypeus about twice as broad 

 as long, slightly rounded on the anterior margin and fitting close to 

 the mandibles ; mandibles with a distinct tooth on the ventral margin 

 near the base; malar space a little shorter than the width of a man- 

 dible at base; eyes wider than the posterior orbits which are only 

 sUghtly receding; ocellocular line about equal to twice the diameter 

 of an ocellus; antennae inserted above the middle of the eyes, 27- 

 jointed, the first flagellar joint nearly four times as long as thick. 

 Thorax smooth; mesoscutum nearly devoid of pubescence, the parap- 

 sidal grooves absent except at the anterior angles where they are 

 deeply impressed, median impression absent; mesopleurae smooth, 

 with a smooth impression below the middle; propodeum rugose with 

 an indication of a median carina basally; wings hyaline; the stigma 

 lanceolate, emitting the radius distinctly before the middle; first 

 radial abscissa equal to about half the width of stigma; second 

 abscissa twice as long as the first transverse cubitus; third 

 abscissa about one and one-half times the combuied length of the 

 first and second abscissae; recurrent nervure joining the second 

 cubital cell; abdomen not longer than the thorax, ovate; first ter- 

 gite rugose, considerably longer than wide at apex, and wider at apex 

 than at base; suturiform articulation distinct, the surface before the 

 fold, except a narrow lateral margin, rugose; beyond the fold to 

 the apex of abdomen smooth and polished. General color black; 

 scape, pedicel, mandibles, except at apex, palpi, tegulae, and legs, 

 including all coxae, pale stramineous; face with a faint castaneous 

 tinge; antennal flagellum brownish-black; wing veins and stigma 

 brown, the veins at base of wmg stramineous. 



Type.— C&t. No. 19374, U.S.I^.M. 



Described from a single specimen in the United States National 

 Museum bearing Illinois accession number 17216. Mr. C. A. Hart 

 informs me that this number refers to the following data: Collected 

 by C. A. Hart while ascending a lonely road through a forest leading 

 up Bald Knob, one of the Ozark hills in southern Illinois. 



NORTH AMERICAN SPECIES UNKNOWN TO THE WRITER. 

 OPITTS ATRICEPS Aslimead. 



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



The paratype specimen of this species in the United States National 

 Museum, is imperfect, the wings having been lost. It appears to be a 

 Microhracon. Owing to the doubtful identity of this specimen and 



