Species of Aculeate Hymenoptera. 43 



tips of the mandibles ferruginous ; the head and thorax strongly 

 punctured; a black vase-shaped outline on the disk of the nieso- 

 thorax, and a black line on each side ; a transverse black line at 

 the base of the scutellura, the latter with a pear-shaped spot in 

 the middle, and an angular spot at its lateral margins ; the pectus 

 black at the base of the coxae, and an oblong black spot beneath 

 the wings ; the wings hyaline ; the apex of the posterior coxae, 

 a brown spot on the femora above, and two on their sides below ; 

 the femora incrassate, and armed with seven black teeth beneath ; 

 the base and apex of the tibiae reddish brown. Abdomen petio- 

 lated ; the margins of the segments narrowly bordered with red- 

 dish-brown, widening into spots at the sides and in the middle. 



Genus Leptofcenus. 



Head globose, deeply excavated above for the reception of the 

 scape; antennae 13-jointed, short and stout, shorter than the 

 thorax, inserted in the middle of the face ; the scape short, the 

 two basal joints of the flagellum minute, the third joint rather' 

 longer than the scape, the 4 — 9 joints each in succession shorter 

 than the preceding, the three apical joints minute, forming, as it 

 were, a single compressed joint, but really composed of three. 

 The thorax elongate ; the prothorax prolonged into a neck ; the 

 wings without nervures, but with transparent traces of neuration 

 very similar to that of the genus Pelecinus, the stigma distinct, 

 the posterior margins of the wing fringed with short hairs j the 

 legs elongate, slender, the posterior tibiae thickened at their apex. 

 Abdomen elongate, the first forming a petiole, the second longest; 

 the ovipositor a little shorter than the abdomen. 



This genus is formed for the reception of an insect which 

 apparently unites in itself some of the characters of the genera 

 Foenus, Megischus and Pelecinus; it resembles the first in the 

 shortness of its antennae, Megisclius in its globose head, and 

 Pelecinus in the almost totally obliterated neuration of its wings. 



Leptofcenus peleciniformis. 

 L. niger, alis hyalinis venis obsoletis, tibiis posticis apicis 



diiatatis. 

 Female. Length 9 lines, of the ovipositor 5 lines. Black and 

 shining j the head with a few transverse striae on the vertex ; the 

 ocelli in a curve ; the face thinly covered with short glittering 

 pale pubescence. The thorax transversely striated ; the wings 

 colourless hyaline and iridescent ; the anterior and intermediate 



