NO. 1102. PROCEEDINGS OF THE NATIONAL MUSEUM. 131 



The gall, structurally, is similar to that produced by A. conifera, 

 Ashmead, and the part embedded in the twig- is triangularly shaved off 

 to a sharp edge. The fly escapes from its larval cell through a hole 

 perforated in the side. 



Gallfiy. — Length, 2.8 mm. Head and thorax black, abdomen j^iceous 

 black, antenna' and legs reddish brown. 



The head and tliorax are shining, but delicately punctnlate, pubes- 

 cent. Head broad, the cheeks bulging. Antenme 13-jointed, incras- 

 sated toward tips; the tirst joint is almost as long as the third and stout 

 the third is about one-third longer than the fourth, the following joints 

 to ninth subequnl, the rest of the joints — except the terminal, which is 

 twice as long as thick — are as thick as long. The thorax has two sharply 

 defined parapsidal grooves; the two short median grooves anteriorly 

 and the groove on the shoulders ap])ear merely as glabrous lines. 



Scutellum rounded, minutely rugose, the fove;e deep but distant. 

 The abdomen is as long as the head and thorax combined, highly pol- 

 ished, the second segment occupying two-thirds its length and pubes- 

 cent at sides; the spine of the ventral valve is very long, about as long 

 as the first tarsal joint of posterior legs, and a little hairy. Wings 

 hyaline, pubescent, veins brown, areolet distinct but small, the sur- 

 rounding veins stout, the vein at base of marginal cell slightly augulate, 

 cubital cell closed, but the cubitus pale at base. 



Type.—^o. 3088, U.S.^^M. 



Four female specimens received through Mr. F. B. Hough, reared 

 October 10, 1884. 



34. CALLIRHYTIS FRUCTICOLA, new species. 



Gall. — This gall consists simply of the white kernel or larval cell 

 embedded in the interior or meaty portion of the acorn, or then on the 

 outside uear its base, generally hidden by the cup. 



Two or three acorns in Dr. Eiley's collection, affected by this species, 

 when cut open, revealed more than a dozen larval cells, closely press- 

 ing upon one another, and filling the whole interior of the acorn. 



Gallfly. — Female. Length, 3 to 3.0 mm. Brownish red, the eyes and 

 middle and posterior tibia; dark brown. 



Antennae 13jointed, filiform, the scape clavate, as long as the third 

 joint, the fourth joint one-third shorter than the third. Head and 

 thorax closely, minutely, rugosely punctate, subi)ubesceut; the parap- 

 sidal grooves distinct, entire; anteriorly are two short grooves reach- 

 ing to near the middle of the mesonotum, and the groove on the 

 shoulders is long. Fovcie of scutellum large, separated only by a 

 carina. Mesopleura punctate, slightly aciculated i)osteriorly. Abdo- 

 men longer than the head and thorax together, gradually rounded off 

 posteriorly and from below a little oblicpiely rounded, the second seg- 

 ment occupying two-tliirds of its whole length, the sutures running 

 obliquely forward to the venter, ventral valve hidden, the sheaths of 

 ovipositor short but slightly projecting. Wings hyaline, veins pale 



