THE CANADIAN ENTOMOLOGIST. 295 



N. Y. Parat^'pes deposited in the collections of the Maine Agri- 

 cultural Experiment Station, Orono, Maine; the United States 

 National Museum, Washington, D. C, and in the private collec- 

 tion of W. C. Woods, Orono, Maine. Type locality, Washington 

 County, Maine. 



"Described from 10 specimens, 7 9 9 and 3 d^cf. Bred from 

 puparia of Rhagoletis porno?? ella Walsh from blueberries, by W. C. 

 Woods, Maine Agricultural Experiment Station; lot 1,700, sub. 17." 



Genus Biosteres Forster. 



1862. Chilotrichia Forster, Verh. Nat. Ver. Preuss. Rheinl., v. 

 19:258. 



Biosteres Forster, Verh. Nat. Ver. Preuss. Rheinl., v. 19:259. 



Rhabdospilus Forster, Verh. Nat. Ver. Preuss. Rheinl., v. 

 19:259. 



1895. Trichopiits Thompson, Op. Ent., p. 2,176. 



1904. Biosteres Szepligeti, Gen. Ins., Fasc. 22, p. 161. 



The following description is a translation of the distinguishing 

 characters of the genus Biosteres Forster, as stated in the Genera 

 Insectorum, fascicle 22, p. 161. 



"Clypeus bare or strongly and thickly pilose (Chilostrichia = 

 Trichopiiis), forming no opening with the mandibles (except. 

 Rhabdospilus). Stigma small and long, the inner side shorter or 

 almost as long as the outer. Second submarginal cell shorter than 

 in Opiiis. Second abscissa of radial vein as long or barely longer 

 than the r-m. Parapsides usually distinct, mesopleura with or 

 without furrows." 



Mr. Richmond mforms me that B. indotatiis Viereck (de- 

 scribed from Kansas in the Trans. Kans. acad. sci., 1905, v. 19: 

 272-278), which is black in colour, is the only other species of 

 Biosteres described from Region 5. 



Explanation of Plate XII. 

 Fig. 1. Biosteres rhagoletis, n.sp., female; fig. 2, fore wing of 

 same; fig. 3, hind wing of same. 



