352 INSECTS. HYMENOPTERA. 



hole receives an egg with the species of fly which serves as the food of the larva when 

 hatched. The opening of the hole is afterwards shut. The colour in this genus is 

 generally black, mixed with yellow ; and they are found on flowers. 



C. cribrarius, Fab. Lat. Antennae and head black, with the upper 

 part of the lip furnished with a silvery down ; thorax black, with 

 a yellow transverse interrupted line at the anterior margin, and 

 another smaller on the scutellum ; abdomen oblong, shining black, 

 with a yellow band on the first segment ; two contiguous spots 

 on the second ; two on the third, and a yellow band on the others ; 

 feet brownish yellow, and the thighs black. 7 lines long. Inha- 

 bits Europe. Nouv. Diet. viii. 353. 



FAMILY V. DIPLOPTERA, Lat. 



Wings folded longitudinally; body black, more or less variegated 

 with yellow or brown ; antennae geniculate in tbe greater part, 

 and thickened towards the end or clavate ; eyes notched ; pro- 

 thorax extending laterally to the origin of the upper wings ; 

 feet of medium length, and not proper for collecting pollen. 



This family is composed of the genus Vespa of Linnaeus, and that which Fabricius 

 established under the name of Masaris. Many of them live in temporary societies, 

 composed of three kinds of individuals, males, females, and neuters. 



TRIBE I. VESPARLE, Lat. 



Antennae distinctly composed of twelve or thirteen joints, accor- 

 ding to the sexes, and terminated in an elongated club, point- 

 ed at the end ; labium sometimes divided into four plumose 

 filaments, sometimes trilobed, with four glandular points at 

 the end, one to each lateral division, and two to the centre 

 one, which is notched or bifid at the extremity. 



I. Mandibles very narrow, approximated before in the manner of a rostrum ; labium 

 divided into four plumose filaments, or trilobed, the intermediate lobe long and 

 narrow ; hood almost cordiform, with the terminal point truncated. 



Solitaries. 



1. Labium divided into four long plumose filaments, without glandular points at the 

 end. 



Gen. SYNAGRIS. 



2. Labium trilobed, with four glandular points at the end. 



A. Upper wings doubled in repose ; three complete cubital cells ; maxillary palpi 

 of six joints, as long or longer than the labial ones. 



Gen. PTEROCHILUS, ODYNERUS, EUMENUS, DISCCELIUS. 



B. The four wings always extended ; two complete cubital cells ; maxillary palpi 

 of four joints, and shorter than the labial ones. 



Gen. CERAMITTS, (Gnatho, Klug.) 



Socialcs. 



II. Mandibles scarcely longer than broad, of a long square form, obliquely and 

 widely truncated at the end ; intermediate lobe of the labium slightly elongated, 

 almost cordiform ; hood almost square. 

 Gen. TRACHYPES, (Klug.) ; FOLISTES, EPIPONA, VESPA. 



1. SOLITARIM. 



Gen. SYNAGRIS, Lat. Vespa, Lin. 

 Females with a sting ; labium divided into four very long mem- 



