THE CANADIAN ENTOMOLOGIST. 93 



long as the ist, both of a clear dark aniber color. Color of the remaining 

 joints dark brown  3rd joint equal in length to the first two : 4th, 5th 

 and 6th gradually shorter, the remaining ones sub-equal. All except the 

 first two closely connate. Thorax black, finely and evenly crackled. Par- 

 apsidal grooves only two. These are sharply defined but remarkably 

 narrow, and widely separated on the collare, but closely convergent on the 

 scutellum. Scutellum more coarsely and less evenly crackled, but in 

 other respects like the mesothorax, from which it is separated by an 

 extremely fine line or groove. Fovae absent. There are on the scutel- 

 lum, also on the mesothorax between the base of the wings, and on the 

 head, a very few microscopic hairs. Legs clear dark amber or yellowish 

 brown. Tarsi darker brown. Abdomen olive brown with paler transverse 

 bands ; ist segment half broader than the 2nd, and with a few very fine 

 hairs on the sides beneath the wings. All the segments, except a narrow 

 border on the anterior edge of each, with an extremely fine punctation 

 that gives to them when highly magnified the opaque effect seen in ground 

 glass. Sheath of the ovipositor short with a minute tuft of hairs at the 

 tip. Ventral valves extending to the extremity of the abdomen. These, 

 with the sheath of the ovipositor, darker than the rest of the abdomen. 



Wings hyaline, medium size. Veins small, dark brown, or black 

 towards the base, lighter at the apex of the wing. Areolet medium size, 

 bounded by equal veins, cubitus disappearing a short distance from the 

 I St transverse. Radial area open, long and narrow. 



Length, body .11, wing .12, antennae .08. 



Galls collected in the Mule Pass Mts. in Arizona, in Nov., 1879, by 

 Prof. E. T. Cox. 



CVNIPS BELLA, n. sp. 



Calls : These belong to tlic class known as oak-api)lt:s. The)' are 

 attached by a minute sessile point to the under side of the leaves of an 

 oak found in Arizona — often near the margin of the leaf, but more com- 

 monly on or near the mid-vein. They are i)erfectly round, and tliose that 

 have escaped the attack of parasites arc quite uniform in size, measuring 

 from 3^ to '//g of an inch in diameter. Tliose stung b)- parasites are gen- 

 erally much smaller, and this species is so subject to their attacks that more 

 than three-fourths are thus affected. The galls (when dry) are of various 

 shades of brown, mostly smooth but not i)olished : a few specimens have 

 a decided!)" russet color and a rough surface. The shell \'ci'\' ihin ;ind 



