.so. 2095. THE BRACOXID SUBFAMi f.Y OPIINAE—GAHAN. 93 



Sul>faraily BR^C03Sri3Sr.A.E. 



MICROBRACON DORSATOR Say. 



Opitts wm6i7ts Provancher, Add. Faun. Canad. Hymen., 1888, p. 382. 



MICROBRACON CANADENSIS Ashmead. 



Opius canadensis Ashmead, Can. Ent., vol. 23, 1891, p. 4. 



MICROBRACON REJECTUS Ashmead. 



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



The original description of this species states that the antennae 

 of the female are 27-jointed and those of the male 21-jointed. The 

 males of Opiinae usually have more joints in the antennae than the 

 females or at least as many. The number of joints is variable in 

 both sexes but rarely if ever to the extent indicated, at least in 

 species havmg less than thirty joints. It seems certain that Ashmead 

 has confused two species in this description. The male type in the 

 United States National Museum is not an Opiinae but a Microbracon. 

 The female is in London and may be an Opius. Since the male 

 symbol is placed before that of the female in the original description, 

 the writer has chosen the male specimen as the type of the species 

 and transferred the name rejectus to Microbracon,. In the United 

 States National Museum are specimens of an Opius agreeing with 

 Ashmead's description and these have been described in the fore- 

 going pages under the name of Opius commodus. The specimen in 

 the British Museum possibly should be referred to this species. 



MICROBRACON NIGER Provancher. 

 Opius niger Provancher, Add. Faun. Canad. Hymen, 1888, p. 381. 



This species seems not to be referable to any of the known species 

 of Microhracon. The following descriptive notes are from the type, 

 a female, and will supplement Provancher's description : Head above 

 smooth, pohshed; face very finely punctate with a sharp median 

 ridge from just below the antennae to the cljqjeus; triangular area 

 before the ocelli and above the antennae very finely punctate; first 

 joint of the flageUum about as long as the scape; thorax smooth and 

 polished, the parapsidal grooves complete but not deeply impressed; 

 propodeum mostly smooth and pohshed with a very short median 

 longitudinal cariaa at the apex, the apical third of the propodeum 

 more or less aciculate-punctate, the aciculations most pronounced 

 each side of the carina; abdomen with the tergites irregularly 

 wrinkled and shining, the ovipositor exserted about the length of the 

 abdomen. 



