284 HENRY SITIMER, M. I). 



it attains the stigma, whence it is slender to the apex; subcostal or 

 rib-vein very heavy during its entire length, slightly bent posteriorly 

 at its junction with the first discoidal and stigiuiitic veins ; stiguiatic 

 vein almost straight, slightly concave. Posterior wing with rib-vein 

 strong; discoidal very slender, hook prominent, a faint dark spot at 

 the termination of the rib-vein. Wings in repose extending one-half 

 beyond the body. Antenna) three-jointed, first and second very 

 short and globular; third five times as long as the other two, (under 

 the microscope is seen to be composed of about 36 plainly visible, 

 subequal, flat, appresscd rings), apex abruptly pointed; the entire 

 anteunai, in the several specimens examined, appear, under the micro- 

 scope, to be quite smooth and free from hairs or spines, except the apex. 

 Legs black or dark colored, almost entirely devoid of hairs or spines, 

 a few hairs on the feet and tibia?, especially the tarsal joints. Ocelli 

 present. 



Larva and pupa. Sub-elipsoidal ; colors light brown to black; 

 some sugary dust and liquid globules in the galls among the inhabitants. 

 ]5ut I could not discover the honey-tubes. 



Measurements of imago — length to tip of wings .10 inch. Wings 

 .07 inch. Antennoe about .02 inch. 



These insects inhabit obliquely conical or horn-like galls on the up- 

 per side of the leaf of Ilamamt'/is Vii-f/iiiica (Witch Hazel), opening 

 on the under side of the leaf; these galls are of a yellow or yellowish- 

 white color at the present time, and of a firm leather-like consistency, the 

 base standing anywhere in the parenchyma of the leaf; they are quite 

 numerous, but I seldom find two on one leaf; usually not tapering be- 

 low the middle, sometimes slightly contracted towards the base. These 

 galls present quite a novel appearance on the leaves when numerous. 

 Grail measurements — length ■] — l inch; diameter at the base I — I in. 



IL\MAMELISTES SPINOSUS, n. Sp. 



Tinarjo. IJody and nicinljcrs usually all entirely l)lack in well ma- 

 tured specimens, in others sometimes brownish. Antenn;e linear, 

 smooth, five-jointed, the two basal joints subglobular, the other joints 

 on short pedicles, third equal to the fourth and fifth, the last slightly 

 shorter than the fourth. Wings horizontally folded in repose, hyaline 

 when matured, when first developed silvery-white ; stigma large, one- 

 fourth the length of the wing, smoky-cinereous, veins greyish-black; the 

 branch of the first vein rises at its lower third, rarely lower down, second 

 vein variable, mostly abortive at its origin for more than one-third of 

 its length, sometimes fully developed when it usually arises from the 



