50 C. P. GILLETTE. 



From two types, both males, which Mr. Ashmead has loaned me, 



I will add the following to the description : 



Second abdominal segment entirely without punctures on the side ; first, second 

 and third antennal joints conspicuously larger ita diameter than those immedi- 

 ately following them, the second joint as long as the fourth, the third joint 

 nearly as long as the fourth and fifth together. The mesonotuni is what I liave 

 termed coarsely transversely rugose in my descriptions. 



Syuergus lignicola (O. S.) 



Cynipn (Synergus ?} liguicola O. S. Proc. Ent. Soc. Phila. i, 1862, p. 252, 9 % ■ 

 Synergus rhoditiformis Walsh, Proc. Ent. Soc. Phila. ii, 1864, p. 499, n. 22, 9 % . 

 Synergm liguicola O. S., Proc. Ent. Soc. Phila. iv, 1865, p. 374, n. 2, 9 • 

 Synergus rhoditiformis Provancher, Nat. Canad. xiv. 1883. pp. 20 and 807, 9 • 

 Synergus lignicola Provancher, Aditt. faun. Canad. Hymen. 1887, p. 165, n. 1. 

 Synergus lignicola Cresson, Syn. Hymen. Amer. 1887, p. 180. 

 Synergus lignicola De Dalla Torre, Cat. Hymen, ii, 1893, p. 112. 

 " Female. —Black. Head with the space behind the eyes (but not the occiput) 

 and also the face below the origin of the antennfe and the mouth, dull yellowish 

 brown varying from dark to pale, the vertex glabrous and moderately polished, 

 the rest of the head opaque and the face finely pubescent. Antennfe nearly as 

 long as the body, 14-jointed, with the last joint scarcely longer than the penulti- 

 mate, yellowish brown with the two basal joints blackish. Thorax with the 

 collare very finely rugose, the mesonotum before the scutel with coarser trans- 

 verse waving strife or rugosities, and with two acute longitudinal strife converg- 

 ing on the scutel, between the base of which strife is a shallow, but widely im- 

 pressed, stria. Scutel rugose, with the two basal fovete subobsolete ; under the 

 wings a small, but highly polished round spot. Abdomen highly polished; the 

 joints succeeding the second concealed by it; the second joint, dorsally, describ- 

 ing a circular arc of thirty degrees. Ventral valve moderate, thin, brownish 

 subhyaline, its tip unarmed and in an angle of foi'ty-five degrees. Sheaths ex- 

 tending a little below or a little above the line of the back, with the ovipositor 

 generally protruding between them. Legs dull pale brown, or brown-black, the 

 trochanters, the knees and the tarsi, excejit their tips, honey-yellow or dull 

 rufous, each successive pair of legs a little darker than the preceding. Wings 

 hyaline ; veins rather fine, the principal ones slightly tinged with brown, the 

 cubitus hyaline and indistinct: areolet moderate, its two basal sides hyaline; 

 radial area about two and a half times as long as wide, distinctly closed by a 

 brownish vein, the areolet pliiced scarcely more than one-fourth of the way from 

 its basal end. Length of female .08-. 10 inch. ; male unknown." 



From Walsh's description of" rhoditiforinU, which he acknowl- 

 edged to be only a dark form of Ivjuicola, we learn that the anteunje 

 in the male is 15-jointed, and that the last joint in the female an- 

 tenna is once iind a half the preceding, and also that the mesonotum 

 in dark specimens may be entirely black. 



Osten 8acken, in his synopsis of the s{)ecies oi' fSifncryus in volume 

 iv, of the " Proceedings of the Entomological Society of Philadel- 

 phia," J). 378, says that the fourth joint of the female antenna is 

 hut little more than one-half the leuirth of the third. 



