MONOGRAPHIA CHALCIDUM. 115 



Art. XV. — Monographia Chalcidum. By Francis Walker, 

 Esq. F.L.S. 



( Continued from page 29.^ 



Family II, — Torymid^. 

 Caput transversum : oculi laterales : ocelli in triangulum dispositi : 

 antennae 13-artIculatae, plus minus ve clavatae : mandibulse tri- 

 dentatss, aut una tridentata altera bidentata : maxillae elongatae, 

 externe liirsutae, interne ciliatae : mentumplus minusve elongatum : 

 labium elongatum, fissura : palpi maxillares articulis 4, ultimo 

 elongate, subfusiformi : palpi labiales articulis 3, secundo brevi : 

 thorax gibbus aut convexus : prothoracis scutellum plerumque 

 antice angustatum : mesothoracis scutum magnum, suturis duabus 

 lateralibus inter parapsides &t scutum proprium bene determinatis, 

 scutellum ovatum ; paraptera triangula : metathoracis praescutum 

 angustum ; scutellum magnum, canaliculatum : abdomen ^^ con- 

 vexum aut gibboso-compressum : oviductus plerumque exsertus : 

 coxas magnae : femora clavata aut subclavata : tibiae apice spinis 

 duabus armatae : tarsi articulo l""' longo, sequentibus longitudine 

 decreseentibus, ultimo longiore, crasso : ungues arcuatae pulvilli 

 distincti : alas anticse nervus solitus ramulum stigmaticalem 

 emittens perbrevem, apice furcatum. ^ 



It may be observed that this family resembles the pre- 

 ceding in the developement of the thoracic segments, the 

 abdomen, &c. ; though the trophi are very differently formed, 

 and the mandibles armed with much longer and sharper teeth: 

 the stigmal branch is very short, curved: the apex furcate, 

 the upper division pointing toward the extremity of the costal 

 nervure, the lower terminated by the stigma : in some of the 

 smaller species the furcation is indistinct. 



The Eurytomidae, and most of the pentamerous Chalcides, 

 have very little variation in the shape of the stigmal branch ; 



^ According to MacLeay there are nine primary abdominal segments, some of 

 which, owing to the great developement of others, are almost evanescent. Of this 

 fact the Chalcides offer a good illustration ; where the shape of the abdomen, 

 owing to the difference in the size and form of the segments, is almost infinitely 

 varied ; and the disposition of the ventral segments differs occasionally in the 

 same species. As a complete description of the abdomen in each species of this 

 tribe would alone fill a volume, and is more appropriate to their anatomy, I have 

 omitted it here ; trusting that the descriptions given will enable entomologists to 

 recognize my genera and species. 



^ Forma ad hanc familiam, Leucospidem, Chalcidem et cognates propria. 



