WALSH DESCRIPTIONS OF N. AM. HYMENOPTERA. 139 



way to the tip. Bullae normal, distinct; C and D very wide apart, C 

 sometimes almost touching the areolet. Length ? .34-.40 inch. Front 

 wing 9 .29-. 36 inch. Ovipos. .20-29 inch. 



The <f differs only as follows from the normal ? : — 1. The 1st abdominal 

 joint is proportionally longer, being full £ longer than wide, and its cari- 

 na are loftier and more acute behind. 2. In the front legs the coxae, as 

 well as both trochanters, are white; in the middle legs both trochanters 

 are white; and in the hind legs both trochanters are white, the tibiae have 

 their terminal f (not £) black, and the tarsi have the basal §-£ of joints 

 1-5 white. Length tf .30 inch. Front wing d 1 .24 inch. 



One 6* ; six 9 . Sufficiently distinct from all the preceding by 

 the two white bands on the hind tibite. The variation in the com- 

 parative length of 2 antenna? and ovipositor is remarkable, some 

 of the longest 2? having the shortest ovipositor and vice versa, 

 and a 2 with a very long ovipositor having very short antennae. 

 A similar variation in the comparative length of the ovipositor 

 was noticed in Rhyssa lunator, Fabr. Say refers his inquisitor 

 to Ichneumon, but so he does also three other species which he 

 describes as having long ovipositors — pterelas, concinnus, and 

 hilaris — the first of which he himself states to belong to Pimpla. 

 His description of the areolet agrees precisely; but the length 

 which he assigns to the body — 2 .25 inch — would be rather too 

 small, if we did not consider that in annulipes my largest 2 is 

 135 per cent, longer than my smallest one. The sexual distinc- 

 tion in the length of the 1st abdominal joint and the development 

 of its carinae is noteworthy, and occurs elsewhere also ; though it 

 does not appear to have been hitherto observed by authors. 



Pimpla SCriptifrOIlS, [Walsh, Trans. Am. Ent. Soc. iii. p. 14S.]— ?.— 

 Differs from the normal inquisitor 9 only as follows: — 1. The clypeus 

 is white, blackish at tip; the mandibles are basally white; a white or- 

 bit, sometimes obsolete from a little beneath the antennae to the mouth, 

 extends from the mouth to the occiput; and beneath the antennae 

 there is a transverse white line, sometimes not attaining the orbits and 

 sometimes medially interrupted for a short space. 2. The terminal \ of 

 the scape, as well as the entire rlagellum, is rufous beneath. 3. The 

 metathorax is rather closely aciculate up to the two carinae, leaving the 

 space between them, the posterior declivity, and the lower part of the 

 pleura, all highly polished. Tegulae, a line under the front wing, a nar- 

 row line which is basally clavate underlying the humeral suture nearly 

 to its tip, a transverse line at the tip of the scutel and another behind it, 

 all white. A large, bright rufous patch above the origin of the middle 

 coxae, and a duller one which is sometimes obsolete on the hind end of 

 the lower face of the mesosternum, the two sometimes confluent and 



