no BRITISH ICHNEUMONS. [Hepiifeloides. 



sufficient facility by the entirely apterous condition of the females, and in 

 the males by the very much less strongly curved basal nervure of the 

 wings, which also usually have the stigma broader. 



Table of Ge/icra. 



(2). I. Petiolar spiracles before centre ; areolet 



wanting Orthopelima, Tasch. 



(i). 2. Petiolar spiracles beyond centre ; areolet 



internally complete. 

 (6). 3. First segment distinctly contracted basally, 



usually slender and narrow. 

 (5). 4. Areolet internally irregular ; scutellum bor- 

 dered Spinolia, Forsi. 



(4). 5. Areolet internally regular ; scutellum not 



bordered Hemiteles, Grav. 



(3). 6. First segment only slightly contracted 



basally, stout and broad. 

 (8). 7. Head transverse ; metathoracic spiracles 



large and oval Otacustes, Forst. 



(7). 8. Head cubical ; metathoracic spiracles small 



and circular Cecidonomus, Bridg. 



ORTHOPELMA, Taschenberg. 

 Tasch. Zeits. Ges. Nat. 1865, p. 137. 



Head short, with vertex narrow, cheeks short, with genal costa inflexed ; 

 mandibles slender and peristomium small ; clypeus compressed, discreted 

 and apically sub-emarginate ; labrum conspicuous. Antennae short and 

 filiform with scape not excised. Pronotal epomia distinct ; mesonotum 

 sub-gibbose, with notauli wanting ; metanotal areae complete and sharply 

 defined with only the basal area wanting ; spiracles small, circular and 

 placed near the base in the spiracular areae ; mesosternal sulci entire and 

 somewhat curved. Abdomen oblong-fusiform, convex, with basal segment 

 linear, nearly cylindrical, not contracted basally, centrally canaliculate 

 throughout, flat beneath with the membrane very short, and the sinracles 

 before the centre ; ventral valvulae not vomeriform, terebra straight and 

 slender. Legs somewhat stout, with the hind ones not elongate. Wings 

 with stigma somewhat broad and triangular, the discoidal cell with its 

 lower angle strongly acute and much longer than the brachial, which has 

 its lower angle rectangular ; areolet usually not indicated ; nervellus 

 slightly antefurcal and not intercepted ; second recurrent strongly sinuate. 



Thomson places this genus among the Pimp/inae, saying that it differs 

 from the Cryptinae in its areolet, the not pentagonal areola, shorter 

 antennae, undeveloped supra-coxal areae, in having the petiolar spiracles 

 before the centre and its membrane extremely short, but (with the single 

 exception of the petiolar conformation) it is certainly better placed in the 

 present group than in the Pimplinae and the antennae are certainly longer 

 than those of the Sii/pfiini, in the typical species. 



The species are probably exclusively parasitic upon gall -making 

 Cynipidae. 



Brischke gives Tonypehna, Forst., as synonymous with this genus, but 

 I can find no description of such a genus. 



