AMERICAN HYMENOPTERA. 259 



ted, the ciliaj much h)tiger than usual. Face rostriforni, narrowed 

 below; the malar space is as long as the antennal scape; on its 

 innerside is an indistinct furrow. Apex of clypeus broadly rounded. 

 Occiput margined. Middle of metanotum depressed, the depression 

 bordered by keels ; the apical slope oblique, bordered by a keel, as 

 is also the stigmal region and the metasternum. Stigma small, 

 oval. Abdominal petiole slender, curved, hardly dilated at the 

 apex ; the stigma placed in the middle. The abdomen as in Lim- 

 neriam, dilated towards the apex ; the ovipositor short, hardly pro- 

 jecting. Legs long and slender, especially the hinder, which have 

 their coxse about 3 times longer than thick ; the tibiie as long as 

 the femora and trochanters united ; the calcaria minute, as long as 

 the 4th tarsal joint, the metatarsus as long as the following 3 joints 

 united ; the apex of femora reaches near to the apex of the abdomen. 

 The systematic position of this genus is not very clear to me. It 

 looks like a small Limnerium, but it cannot very well be placed in 

 the Ophioninse. It has the neuration of the front wings as in the 

 Acoenitini, but it differs from that grouj) in the form of the abdo- 

 men and in the long slender legs. It might be referred to the 

 Labenini from the long hind coxae, but otherwise there is not much 

 resemblance. The form of the mouth separates it from the Xorides. 

 The structure of the 1st abdominal segment is different from what 

 it is in any of the tribes of the Pimplinje, being much more similar 

 to the abdomen of the Campoplegini. What ever its relationship 

 may be it should be readily known by the rostiform head, furrowed 

 malar space, depressed middle of the median segment, long slender 

 petiole, with the stigma in its middle, short, almost obsolete trans- 

 verse cubital nervure, long hind coxjb, the middle coxae being also 

 elongate, and unbroken transverse cubital nervure in hind wings. 



Paipila longipes sp. uov. 



Black; the 4 front legs testaceous, the middle femora and tibise infuscated • 

 the clypeus at the apex, mandibles and palpi rufo-testaceous ; tegulse yellow; 

 middle and base of abdomen testaceous, the apes of the basal 3 segments of the 

 abdomen narrowly obscure yellow; wings hyaline, the nervures black, the 

 stigma fuscous. 9- Length nearly 5 mm. 



Antennae as long as the abdomen, which is more than double the lengtli of the 

 thorax ; densely covered with a short pile. Head and thorax closely minutely 

 punctured ; there is a raised, more shining line down the face. Abdomen smooth 

 and shining; the 1st segment has a furrow in the centre above; it is as long as 

 the 2nd and 3rd united. Hind coxte closely distinctly punctured. 



Hah. — Mexico. 



TRANS. AM. ENT. SOC. XXX. SEPTEMBER. 1904. 



