336 INSECTS. HYMENOPTERA. 



Some have the last half segment of the abdomen prolonged into a point, with a 

 projecting perforator of three filaments ; in others this ovipositor is of a capillary form, 

 and rolled up in a spiral form in the interior of the abdomen. The larva which are 

 known are hexapodal, and live in wood. 



Gen. UROCERUS, TREMEX, ORYSSTTS. 



Gen. UROCERUS, Geoff. Lat. Sirex, Lin. 

 A projecting perforator of three filaments in the females ; abdo- 

 men sessile, terminated in a horny point ; inferior lip rounded ; 

 maxillary palpi very short, with less than five joints ; the la- 

 bial hairy, terminated by a thick and globular joint; anten- 

 nae setaceous, inserted between the eyes, and of more than 

 twelve joints; body elongated and cylindrical. 



U. gigas, Lat. Antennae yellow ; head brown, with a large yellow 

 spot on each side behind the eyes ; thorax brown, slightly hairy ; 

 abdomen brown, with the first and last two segments yellow ; feet 

 yellow ; thighs brown ; wings transparent, and the nerves ferrugi- 

 nous. About an inch long Shaw, vi. pi. 91. 



These Uroceri are found more particularly in pine forests, in cold and mountain- 

 ous countries. They make a buzzing noise when flying, and appear in certain years 

 in such numbers as to be an object of terror to the peasantry. The larva has six 

 feet, with the posterior extremity of the body pointed, and lives in wood. 



FAMILY II. PUPIVORA. 



Wings of many with a small number of cells, and in others 

 without longitudinal nerves; first segment of the abdomen 

 inclosing the metathorax posteriorly, and making part of it ; 

 the second, or, from its appearance, the first, is fixed to the 

 preceding by a pedicle. 



The larvae are apodous, carnivorous, and parasite ; there is an ovipositor in the fe- 

 males, and from the structure of their body the animal can raise or lower the abdomen. 



TRIBE I. EVANIALES. 



Abdomen implanted on the thorax above the origin of the two 

 posterior feet, and in many even almost immediately below 

 the scutellum ; wings veined, and the upper ones cellular ; 

 antennae filiform or setaceous, with from thirteen to fourteen 

 joints ; maxillary palpi often very apparent ; perforator in the 

 greater number projecting, and of three filaments. 



I. Abdomen very short, triangular, or ovoid, compressed, inserted very near the scu- 

 tellum, pediculated ; antennae geniculate. 



Gen. EVANIA. 



II. Abdomen of ordinary size in some, very long in others. 



1. Posterior legs clavate ; abdomen clavate, elongated or filiform, very long, jointed, 

 and arched. 



Gen. FCENUS, PELECINUS. 



2. All the legs slender ; abdomen sickle-shaped or ellipsoidal. 



Gen. PAXYLOMMA, (Brebisson); AULACUS. 



Gen. EVANIA, Fab. Lat. Sphex, Lin. 

 Antennae filiform, of twelve or thirteen joints ; mandibles den- 



