66 H. F. BASSETT. 



2. H. coralliiius n. sp. 



Galls received from Mrs. E. H. King, of Napa City, Cal. The 

 first lot received were old galls from which the insects had escaped j 

 they were black, but fresli ones are of a fine reddish buff color; they 

 are attached to the small twigs of one of the varieties of dwarf oak 

 and are perfectly round, but the surface is irregularly and thickly 

 studded all over with short, stumpy projections which differ in size, 

 and that are as large or even larger at the summit than at the base. 

 There is usually a slight depression at the end. These remind one of 

 certain species of coral. The surface, projections and all, is covered 

 with a hard, close, velvety pubescence, if anything so closely ap- 

 pressed can be called velvety ; the single larval cell is not free ; the 

 substance of the gall bright shining yellowish brown ; the size is 

 nearly three-fourths of an inch in diameter. The size and the blunt 

 horns remind one of A. speciosus Bass., but that species is smooth, 

 and the galls are found on the leaves only. 



The insects from which the following description was made were 

 cut from the galls from which they had nearly eaten their way out ; 

 they are all females. 



Gall-flies. — Eutire body, except a small spot on tlie dorsal ridge of the ahdo- 

 iiien, thickly covered with short silvery white hairs, those of the aiiteiinie and 

 the middle of the pleurse shorter and less conspicnous. Color, except the brown- 

 ish black antennae, reddish brown. Head a shade lighter than the thorax, wliicii 

 is itself less dark than the abdomen. Antennx: first joint of the 14-jointed 

 antennae oblong-oval and only a little darker than the head ; second joint very 

 small and round, third one-fourth longer than the two preceding taken together, 

 fourth a little longer than the first and second ; remaining ones gradually shorter 

 to the last, which is twice as long as the thirteenth ; it lias an indistinct annu- 

 lation, which might be taken for a true joint. Lines on the mesothornx dnrker 

 than the general suiface; two closely contiguous, smooth, parallel Hues from the 

 collare half way to the scutellum ; parapsidal grooves very widely separated at 

 their origin on the scutellum, shallow and almost hidden by the ajipressed hairs 

 and wholly disappearing before reaching the middle of the mesonotum ; scutellnm 

 rounded, foveae wanting. Abdomen more densely hairy than any other part of 

 the body and the hairiness extends to all the joints that are visible. Color of 

 the legs somewhat lighter than the body; ungues one toothed. Wings hairy, 

 veins dark, but not heavy; areolet small, cubitus not quite reaching the first 

 transverse; radial area open, basal vein angulated. Length: body, .16 inch.; 

 wings, .18 inch. ; antennae, .10 inch. 



.3. H. caiiescens n. sp. 



On one of the oak branches sent by Mrs. King, which bore several 

 galls of H. corallbius just described, was a short branchlet on which 

 were four or five galls of another species. 



