264 MAINE AGRICULTUR-A.L EXPERIMENT STATION. I915. 



was fortunate enough to witness oviposition. The long ovi- 

 positor was thrust its full length into the berry. The larva 

 selected formed its puparium on September ii, 1915, so it could 

 not have been more than a day or two old when the egg of the 

 parasite was deposited in it. It is. therefore, a larval parasite 

 although the parasitized larva grows normally and forms its 

 puparium. In the field the parasite doubtless passes the winter 

 protected within the puparium of the host and does not emerge 

 until mid-summer or later. 



These parasites belong to the family Braconidae and to the 

 subfamily Opiinae. Specimens were submitted to Mr. E. A. 

 Richmond of Cornell Universit}'. who determined it as a new 

 species and named it Biosteres rhagolctis. The original descrip- 

 tion which appeared in the Canadian Entomologist for Septem- 

 ber. 1915. V. 47: 293-295, pi. 12, is here reprinted with 'Mr. Rich- 

 mond's permission : 



Biosteres rhagoletis (description of adult by Mr. Richmond) 

 '"Fulvous (xanthine orange) ; antennae, except scape in $ (partly in 

 $ ), terminal joints of pro- and mesothoracic tarsi, entire metathoracic 

 tarsi and tips of mandibles, brown; ej'es and ocelli black; wings with 

 membrane colorless, nervures and stigma brown ; sheath of ovipositor 

 brown; inner stj-lets fulvous. Length 3 mm.; ovipositor 3 mm. Habi- 

 tat — CherrjTield, Maine. 



"Head shining, closely tessellate, punctulate, pilose (including mouth- 

 parts) ; ocellar elevation impunctate and not pilose ; face with a median 

 longitudinal elevation, almost a keel ; clypeus with sparser punctures in 

 center; flagelhim 36-41-jointed; scape a little longer than first joint of 

 fiagellum, pedicellum globular. Thorax shining, sparsely punctulate and 

 pilose ; parapsidal furrows converging and ending in a median V-shaped, 

 impunctate impression, which lies in the posterior third of the mesono- 

 tum; mesonotum (including scutellum) margined; propodeum not flat 

 but rounded, more pilose and punctulate than the rest of thorax, irregu- 

 larly rugulose and tending to have poorly-defined areoles, which are 

 more especially prominent in $ 9 ; r (first abscissa of the radius), a 

 little more than 1-6 as long as r-m ; shorter than the petiole of M^ ; M, 

 petiolate, petiole about 1-5 as long as m-cu. Abdomen finely punctulate, 

 shining, verj- sparsely pilose; ist segment margined lateralh', finely and 

 closeh" striated with some of the elevations often more prominent at 

 basal half; 2nd segment with a little more than its basal half finely and 

 closely striated (or sometimes almost entirely striated,) except at sides; 

 $ and 2 similar, except as noted above." The female is illustrated in 

 figure 62, A, B and C. 



