WALSH DESCRIPTIONS OF N. AM. HYMENOPTERA. Ill 



be identical with manifestator^ Linn. (Europe) ; but Mr. Cresson, 

 in enumerating the characters which separate that species from 

 his occidentalism does not mention any of those which separate 

 gigas from occidentalis. E. rufescens^ Cress. (Cuba), and all 

 the lo species described by Brulle, differ in the body being partly 

 luteous, ferruginous, or rufous, and in other respects. 



Ephialtes pygniseas, n. sp. — 9. — Differs from gigas ? as follows: — i. 

 The size is i smaller. 2. The face is polished and but sparsely punctate. 

 3. The carinae of the metathorax are much less prominent in front and 

 subobsolete behind. 4. The relative proportion of abdominal joints 1-5 is 

 somewhat different, 2 being dif-tinctly shorter than i, and 2-5 each about 

 \ shorter than the preceding, so that 5 is only about i as long as i ; and in 

 addition, instead of 2 being 2^ times as long as wide, it is only li times as 

 long as wide. 5. The tubercles on abdominal joints 2-5 are round, not 

 elongated. 6. The ovipositor is rather piceous than black. 7. The legs 

 are pale rufous, but both trochanters of the front leg, the outermost one 

 of the middle leg, and sometimes the outermost one of the hind leg, are 

 distinctly whitish; and the 4 front knees, tibiae and tarsi are yellowish- 

 white, the exterior tips of the tibiae and the tarsal tips obfuscated, espe- 

 cially in the middle legs. In the hind legs the terminal \ of the femur is 

 fuscous, the tarsus is entirely fuscous, and the tibia is fuscous with its 

 basal \ white and a whitish interior vitta extending § of the way to the tip. 

 8. The wings are subhyaline. Length V .58-.63 inch. Front wing ? .46 

 -.48 inch. Length abd. V .38 inch. Width abd. 9 .07 inch. Ovipos. 

 •73-83 inch. 



Two $ ; (? unknown to me. Differs from occidentalism Cress., 

 ■ by the first two characters which separate gigas from that spe- 

 cies, and by the ist, 2d, 3d, 4th and 7th characters which sepa- 

 rate pygmceus from gigas. From tnanifestator (Europe), rufes- 

 cens, Cress, and Brull^'s 10 species, it differs in the same way as 

 gigas does. 



Ephialtes posio, n. sp.— $. — Differs from gigas 5 as follows:— i. The 

 size is h smaller. 2. T^e face is highly polished and scarcely punctate. 

 3. The metathoracic carinae are obsolete, being represented only by a 

 slightly impressed stria extending | of the way to the tip. 4. The carinee 

 of the 1st abdominal joint are entirely obsolete. 5. The relative propor- 

 tions of the first 5 abdominal joints are quite different, 2-4 being equal in 

 length and each twice as long as wide, and i about ^ shorter, and 5 a trifle 

 shorter than 2-4. 6. The usual tubercles are obvious only on 3 and 4, and 

 are much less prominent and round, not elongated. 7. The ovipositor is 

 rather piceous than black. 8. The legs are pale rufous, all the sutures a 

 little darker, hut both trochanters of the front leg, and the outermost one 

 in the middle and hind leg, are whitish; and in the front leg the tarsal 

 tip, in the middle leg the exterior face of the tibia and the whole tarsus, 



