320 AMERICAN HYMENOPTERA. 



This species differs materially from .1. echinus 0. S., though the 

 galls bear a close resemblance to that species as described by Baron 

 Osteri Sacken. The black body of the insect, and the entire 

 absence of clouds or spots in the subhyaline wings seem to separate 

 them specifically. 



Amlrieus C'oxi n. sp. 



Galls. — Woody swellings on small branches of Quercus virens, 

 sent me several years ago by the late Prof E. T. Cox from Arizona. 



The largest galls I have are three-fourths o\' an inch in diameter, 

 and are nearly two inches in length. They hear a very close resem- 

 blance to the galls of Andricus Suttoni B., but the insects are quite 

 different. 



The tlies in my collection are all females. 



Head and thorax brownish red. Antennae fourteen jointed, first large, second 

 one-half as long as the first, smaller, third two and one-half times as long as one 

 and two together, fourth as long as one and two together, five to fourteen inclu- 

 sive -hort and dull dusky red. Thorax microscopically punctate. Parapsides 

 deep, smooth and somewhat darker than the general surface of the thorax. Scu- 

 telluni finely punctate, separated from the thorax by a broad, shining groove, 

 Which is scarcely foveate. Abdomen dark, almost black. Legs pale, brownish 

 red. Wings large, subhyaline. Veins very slender, pale brown. Areolet small. 

 Radial area open : cubitus slender, but reaching to the first transverse. 



This species is smaller and of a lighter color than A. Suttoni B., 



and the venation differs from that species. 



AmlriciiK Ashmeadii a. sp. 



Of this remarkably distinct species I took nine females oviposit- 

 in- in the buds of Q. bieolor, April 13, 1890. They are black, ex- 

 ceps the antennae and legs, which are dark reddish brown. Head, 

 thorax, an ten use and legs hairy; hairs short and appressed. An- 

 tennae fourteen jointed, first rather long and hairy, second short and 

 about as long as thick, third medium size and length, fourth two- 

 thirds and the fifth one-half as long as the third, sixth and seventh 

 short, ami the apical seven very short, the hist two joints less dis- 

 tinctly separate than the others, and in one specimen the suture in 

 one antenna is quite distinct ami absent in the other. In still 

 another specimen the fourteenth joint has a distinct suture, but the 

 two parts only equal the sutureless joint in ordinary individuals. I 

 mention these irregularities, for had my description heen founded 

 on either of these erratic individuals, it would not have answered 

 for what is, undoubtedly, the normal structure. 



