504 Rev. T. A. Marshall’s monograph of 
much like Trachusa, Jur., a genus of bees, and he 
therefore invented a new name, Cosmiocarpa. Trachusa, 
however, is not adopted by hymenopterists, as far as I 
know, and, besides, it is not the same as T'rachyusa. 
For these reasons I have restored the name given by 
Ruthe. 
1. Trachyusa aurora, Hal. (PI. XI., fig. 2, 3). 
Alysia aurora, Hal., Ent. Mag., v., 217, $2). 
Trachyusa nigriceps, Ruthe, Stett. Zeit., 1854, p. 352. 
Variable, usually testaceous, with the head, the metathorax, and 
the base of the abdomen, black. @ Head shining ; mandibles tes- 
taceous ; palpi very pale. Antenne slender, longer than the body, 
blackish with the base testaceous, 30-34-jointed. Furrows of the 
mesonotum converging to a fovea situated before the scutellum ; 
pleuree somewhat dusky ; metathorax rugulose. Wings hyaline ; 
squamule and stigma testaceous, the latter almost orange-coloured ; 
posterior angle of the 2nd cubital areolet produced ; 2nd discoidal 
areolet incompletely closed at the end ; recurrent nervure hardly 
rejected. Legs testaceous. Abdomen linear, slightly clavate, 
depressed ; Ist segment short, not much narrowed at the base, 
rugulose, blackish or fuscous, either at the base or entirely; 
2nd thickly punctulate and dull, except at the extremity, trans- 
versely bisected by an impressed line; the following segments 
punctulate at the base. ‘Terebra very short. ¢ Stigma black ; 
posterior abdominal segments blackish. Length, 14-1? ; wings, 
23-33 lin, 
Var. 1. Mesonotum fuscous. 
Var. 2. ¢ Black; underside of scape, mandibles, legs, and abdo- 
men, testaceous ; Ist abdominal segment blackish. Intermediate 
varieties also occur, 
A rare species; taken in England, Ireland, Germany, 
and Holland. I have only once met with it in England, 
but Dr. Capron obtained several at Shiere. 
v. Atna@a, Hal. 
Hal., Ent. Mag., i., 265 (1833). 
Maxillary palpi 6-, labial 4-jointed. First joint of the flagellum 
longer than the 2nd. Metathorax carinated. Wings of the ? 
usually as long as the body, but sometimes shortened more or less ; 
radial areolet large, cultriform, reaching the tip of the wing ; radial 
