412 MR. F. SMITH ON NEW SPECIES OF ICHNEUMONS. [May 1, 



gate marginal cell and three submarginal ones, the first submarginal 

 elongate, broad at the base, and narrow towards the apex ; the second 

 submarginal minute, subtriangular, and with a short petiole ; the 

 third submarginal elongate, narrow, and extending to the apex of 

 the wing ; the anterior tarsi twice the length of the tibise ; the pos- 

 terior tarsi only a Httle longer than the tibiae ; the claws of the tarsi 

 bifid ; the pulvillus small. Abdomen curved, narrowed at the base, 

 and slightly compressed ; the two basal segments of equal length, 

 the three following of equal length and a little shorter than the basal 

 one ; the two apical segments shorter than the fifth ; the ovipositor 

 nearly seven times the length of the insect. 



DoLiCHOMiTUs LONGiCAUDA. (Plate XLIV. figs. 2 and 2 a.) 



Black and shining, with the base of the abdomen yellow ; wings 

 smoky. The face finely punctured, slightly convex ; a minute 

 yellow spot, in some examples, at the lateral angles of the face, close 

 to the base of the mandibles ; the anterior margin of the clypeus 

 broadly but slightly emarginate. Thorax — the metathorax nearly 

 flat and oblique ; wings fuscous, with a purple iridescence, the 

 anterior margin of fore wings dark brown ; the anterior tibiae more 

 or less ferruginous within, occasionally black. The two basal seg- 

 ments of the abdomen above, and all beneath, bright yellow ; the 

 sheaths of the ovipositor black, the latter ferruginous. Length 

 9-11 lines ; of the ovipositor 3g-6g inches. 



Hab. Bogota, Columbia. 



Genus Perissocertjs, Smith. 



Head subglobose; antennae 22-jointed, joints 3rd to 7th densely 

 pubescent, at the apex of the seventh joint the antennae are elbowed, 

 as is also the terminal joint. Thorax oblong ; the metathorax ob- 

 long-quadrate, divided into six compartments above by two longitu- 

 dinal and one transverse carina ; wings with one elongate marginal 

 cell and two submarginal ones ; the posterior legs rather stout, 

 elongate, the femora somewhat swollen ; the claws of the tarsi simple 

 and very small ; the first joint of the tarsi longer than the rest 

 united. Abdomen with a short petiole, depressed beyond the first 

 segment, the second and third tuberculate at the base ; the oviposi- 

 tor nearly as long as the head and thorax. 



Perissocerus PLUMicoRNis. (Plate XLIV. figs. 3 and 3 a.) 



Head and thorax black and shining ; the abdomen bright ferru- 

 ginous. The head subglobose ; the antennae black to the apex of 

 the seventh joint and densely clothed with short black pubescence ; 

 the eighth joint to the fourteenth white, with the apical joints black. 

 The mesothorax with two deep sutures, each emanating from the 

 middle of the margin of the scutellum, and diverging forwards to 

 the sides, and dividing the disk into three parts, which are convex, 

 and covered with curved striae ; wings hyaline, stigma and nervures 

 black ; the coxae, trochanters, and femora ferruginous ; the tibiae 



