378 Annals Entomological Society of America [Vol. IV, 



much longer than wide. Abdomen smooth and shining, compressed 

 beneath, ventral valve projecting and acutely pointed. Wings hyaline, 

 pubescent, veins brownish black, radial cell short, closed, with a brown- 

 ish cloud, vein at base angulate, areolet distinct, cubitus reaching 

 basal vein. Length 3 mm. 



Gall. Small globular galls with weak spines, on leaves of wild rose 

 (Rosa calif ornicd), often in tangled clusters. 



Habitat. Pt. Arena, Cal. (Miss Mabel Patterson.) Los 

 Angeles. (Beutenmiiller.) 



15 LYTORHODITES Kieff. 



Lytorhodites, Kieffer, Bull. Soc. Metz, ser. 2, vol. 10 (1902 i. p. 96. 



Differs from Rhodiles only in the following particulars: scutcllum 

 without fovca j , radial cell more or less open at the margin, abdomen 

 usually faintly reticulate. Galls on Rosa. 



Lytorhodites aref actus (Gillette). 

 Rhodites arefactus, Gillette, Can. Ent.. vol. 26 (1894), p. 157. 

 Lytorhodites an : ictus, Kieffer, Bull. Soc. Metz., sit. 2, vol. 10 (1902), p. 97. 

 Rhodites similis, Beutenmuller, Bull. Am. Mus. Xat. Hist., vol. 2:; (1907) 

 p. 640. 



"The galls arc dense, corky enlargements of small shoots, usually 

 close to the stem from which the shoot arises, and the shoot is usually 

 dead beyond the gall when the latter is mature. The galls are irregular 

 in shape, vary from one-half to seven-eighths of an inch in diameter, 

 and are polythalamous. The surface is of a rusty color, is finely 

 wrinkled, and reminds me of dried fruit. The surface appears dry and 

 hard, but it is easily dented with the finger-nail and is always free 

 from spines. 



"Described from eighteen galls collected in March in the vicinity 

 of Fort Collins, Colorado. Galls brought into the laboratory March 

 7th began giving flies March 2:5rd. 



"Gall-flies. Females. General color cinnamon-rufous; head en- 

 tirelv rufous, except a blackish area between cither compound eye and 

 the mouth; under a power of till diameters the lower face appears rather 

 coarsely wrinkled, the wrinkles converging towards the mouth, the upper 

 face, vertex and occiput very finely rugose; the face sparsely set with a 

 short gray pubescence; antenn;e short, the first three joints, and some- 

 times the base of the third, rufous, the remaining joints black; number 

 of joints, 14. Thorax rufous above, with a black suture separating 

 the mesothorax and scutellum, parapsidal grooves entire, broad, moder- 

 ately deep, well separated at the scutellum, and with numerous elevated 

 lines crossing them; median grooves distinct and extending well forward. 

 The surface of the thorax is finely rugose, and, in a proper light, shows 

 numerous punctures, each puncture bearing a short yellowish hair. 

 Scutellum coarsely wrinkled near the margin and less coarsely wrinkled 

 on the central portion, which is considerably elevated, transverse 

 groove at base, color rufous. Mesopleura, except spot just beneath 

 the wings, rufous, sutures, metathorax and sternum black or blackish; 



