140 W. H. ASHMEAD. 



17. AcraspifS echini u. sp.— (The Echinus Acraspis.) 



Galls. — Precisely similar to the galls of Acraspis erinacei Walsh, netted or fis- 

 sured like a strawberry and covered with spiny prickles as in that species, only 

 the gall is never so large and the netted surface is slightly coarser. The ma- 

 jority of the specimens are two-celled, although occasionally four-celled ; when 

 this happens, which is seldom, I think it is occasioned by the union of two galls ; 

 they are never eight-celled, as is sometimes the case with Acraspis erinacei W. 



Gall-fly. — 9 • Tjeugth .13 to .15 inch. Color reddish brown. Head and thorax 

 finely rugose ; eyes dark brown ; ocelli red, shining; antennae 14-jointed, about 

 as long as the whole body, filiform, dark brown above, paler beneath, first joint 

 and some of the other joints at tip, slightly yellowish, joints to eighth long and 

 slender, the third joint being the longest, joints from eighth to tip short, the 

 terminal joint being slightly longer than antepenult; thorax slightly pubescent, 

 parapsides distinctly visible posteriorly ; scutellum ending in a blunt, but not a 

 very distinct horn, pubescent; wings in the form of two oblong white scales as 

 long as hind coxae ; legs reddish brown, more or less obfuscated, particularly 

 along the outer edges of tibiae, pubescent ; abdomen bright reddish brown, smooth 

 and shining, compressed, vertically it is as wide as long, the sheaths of ovipositor 

 projecting and thickly tufted with hairs; sides of second segment but slightly 

 pubescent. 



Described from numerous specimens bred in November. Speci- 

 mens of Acraspis erlaacel Walsh, from the white oak (^Quercus alba) 

 are in my collection ; the flies are smaller and very distinct from this 

 species. 



Galls oil the Laurel Oak (Quercus laurifolia). 



To the numerous galls occurring on this oak, recorded in my pre- 

 vious papers I have the pleasure of adding the following new species : 



18. BfeuroterilS loilgipeuilis n. sp.— (The Loug-winged Nenroterus.) 

 Galls. — Small, oblong, Irregular, woody swellings, surrounding the base of new 



shoots, from .35 to .40 of an inch in length, by from .14 to .16 inch in diameter. 



Gall-fly.— 9 • Length .04 to .05 inch. Black, smooth and shining. Antennie 

 and legs including all coxae, yellowish, thorax smooth, without parapsidal grooves, 

 although in certain lights there are opaque lines ; scutellum tumid, finely rugoso- 

 punctate; abdomen very small, black, shining; wings hyaline, very long, meas- 

 uring nearly .08 inch from base to tip, the radial area is open, and is very large 

 and long, the areolet is distinct and the cubital cell is closed, the cubitus being, 

 however, very pale. 



Described from eight specimens bred May, 1886. 



19. Neuroterus laurifolise n. sp.— (The Laurel-oak Wooly Gall.) 



Gall. — An oblong, wooly gall on the upper or lower surface of the leaves ; the 

 wool is fawn colored, long and fine, covering three or four, sometimes niore» 

 irregularly rounded, flattened disks, in the centre of which live the flies; they 

 are attached to the midrib by a nipple-like point ; the disk or cell is concave 

 above and measures .08 to .10 inch in diameter. 



