WALSH DESCRIPTIONS OF N. AM. HYMENOPTERA. 1 33 



cence, and half wider than the last tarsal joint of the hind leg. Length d 1 

 • 37-.54inch; $ .5S-.64 inch. Front wing tf .31-.40 inch; $ .49~-53 inch 

 Ovipos. .28-.30 inch. 



Seven d ; three 2. Mr. Cresson's specimen was probably al- 

 coholic, which may account for the discrepancies in the color of 

 the legs and wings. There are no other sexual distinctions than 

 the usual stoutness of the d antennae, and the slight difference in 

 the coloring of the front coxae. The tegulse in all my specimens 

 are black, which is unusual in this genus. It is possible the <d of 

 pedalis that Brulle has erroneously correlated with his 2 rufipes 

 from S. Am. At all events his brief description agrees with pe- 

 dalis. The 2 is very like instigator 2 (Europe), but that species 

 has rufous legs, with all the coxae and trochanters and the hind 

 tarsi black 2. 



Pimpla [pterelas, Say.]— $. — Black. Head perfectly glabrous and 

 highly polished. Palpi dull dark rufous. Antennae § as long as the body, 

 with the ist joint of the flagellum 3^ times as long as wide, brown-black, 

 tinged with rufous beneath towards their tips. Thorax polished, sparsely 

 and finely punctate, glabrous on the mesosternum and its pleura; the two 

 carina; of tne metathorax extending to the posterior declivity, the others 

 obsolete. Tegulre yellowish-white. Abdomen polished, rather coarsely 

 and closely punctate except behind and on the tips of the joints, the usual 

 tubercles pretty distinct. Joint 1 longer by \ than wide and h wider be- 

 hind than before, the usual carina? extending f of the way to the tip and 

 enclosing between them on the basal h of the joint a polished oval exca- 

 vation. Ovipositor piceous, full h as long as the body; sheaths black, 

 scarcely tapered, rather hairy than pubescent, the hairs dense and long, 

 and the sheath including its hairs scarcely wider at base than the 

 last tarsal joint of the hind legs. Venter dull whitish. Legs bright pale 

 rufous, immaculate save the usual obfuscation of the tarsal tips. Wings 

 subhyaline, tinged with smoky yellow; veins black, radius rufous except 

 towards the stigma; stigma black, its basal \ whitish. Areolet rhomboido- 

 triangular, the 2d recurrent vein entering it scarcely f of the way to its 

 tip. Bullae all distinct and normal, C and D very wide apart. Length 

 $ .37 inch. Front wing $ .29 inch. Ovipos. .22 inch. 



One 2 ; <d unknown to me. Differs from the preceding by 

 the glabrous and highly polished face, the pale tegulae, the hairy 

 sheaths, and the immaculate legs. 



ft Hind tibice black with a medial white band. 



Pilll])la aunulipes, Brulle.— ^ $.— Differ from [pterelas. Say,] 2 only 

 as follows :— 1. The head is sparsely and finely punctate, especially on 

 the face, which is sometimes so pubescent as to appear opaque, sometimes 

 has the pubescence mostly removed so as to be subpolished. A minute, 



