May-July 1SS9.] 



PSrCHE. 



217 



nium joining the clypeus is finely 

 rugose. AntenniE 13-jointed; third 

 joint the longest ; joints from 3-12 grad- 

 ually shorter; the 13th equal to the two 

 preceding in length. The terminal 

 joints, under a power of 50 diameters, 

 appear distinctly fluted longitudinally. 

 Color of the antennae black, except the 

 first two joints which are brown-black. 

 All the joints are rather thickly set with 

 a fine pubescense. Parapsidal grooves 

 begin midway on the thorax and extend 

 back to the scutellum. They are very 

 shallow and to the unaided eye appear 

 like two narrow black lines. A little 

 forward of the grooves two parallel 

 black lines arise and extend forward to 

 the collar. Near the base of the wings 

 on either side there begins another 

 black line that runs to the scutellum. 

 In the two latter cases the black lines 

 are narrow, strips of the thorax that 

 have no hairs growing upon them. 

 Scutellum without fovae or grooves, 

 rounded and elevated posteriorly, cov- 

 ered with a yellowish brown pubescense, 

 very irregularly rugose and black in 

 color, except the tip, which is usually 

 brown. Tegulae brown. Abdomen 

 shining black with silky pubescense on 

 the sides of the second segment. Under 

 a power of fifty diameters the sides of 

 the abdominal segments appear crackled 

 or scaled and finely punctate. Wings 

 hyaline ; cross veins black and heavy ; 

 radial nervure not reaching the costal 

 margin. Length of wing 5.2 to 5.7 

 mm. Legs very dark cinnamon brown 

 and rather thickly set with a gray pubes- 

 cense. Terminal joints of tarsi black. 



Length 4.2 mm. 



Described from nine specimens reared 

 from the galls. 

 Cynips nig^ricens n. sp. 



Galls in clusters attached to the mid- 

 rib on the under side of the leaves. 

 The galls are cone-shaped, and resemble 

 very small galls of C. strobilana. The 

 galls fall to the ground a little before 

 the leaves drop in the fall. From a 

 large number of these galls gathered in 

 October, 1SS7, I obtained one perfectly 

 developed female late in September, 

 188S. The fly may be described as 

 follows : 



Color, except joints of legs, tarsi, and 

 venter, black. 



All parts of the insect except the 

 dorsal portion of the first two or three 

 abdominal segments, and compound 

 eyes, are rather densely and evenly cov- 

 ered with a short gray pubescence set 

 in minute punctures. 



Head : vertex and occiput appear to 

 be covered wnth minute thick scales ; 

 clj'peus and front rather coarsely punc- 

 tate. Antennae 13-jointed ; first joint 

 stout, third joint longest, third to seventh 

 gradually shorter, eighth to twelfth sub- 

 equal, thirteenth as long as the two 

 preceding and with a slight indication 

 of a division at its middle. The last 

 five or six joints form a slight club and 

 are fluted longitudinally. Length 2 mm. 

 Thorax : parapsidal grooves distinct but 

 narrow ; widely separated at collar, and 

 forming a double curve as they pass 

 over the thorax to the scutellum. Two 

 black parallel lines begin midway on the 

 thorax between the parapsides and 



