174 BRITISH ICHNEUMONS. [Cecidonomies. 



CECIDONOMUS, Bridgman. 



Bridg. Entoni. 1880, p. 264; </. Fitch. //'/'. cit. p. 254; (?) Diat^Iypla, Forst. Ver. pr, 

 Rheinl. 1868, p. 176. 



Head sub-cubical, dull and coriaceous ; face pubescent and convex ; 

 mandibles as broad as length of cheeks. Antennae filiform, not longer 

 than abdomen ; pedicellus longer than scape and as long as the following 

 joint. Thorax coriaceous, slightly longer than high ; pronotum somewhat 

 elongate ; metathoracic areae more or less distinct, areola sub-pentagonal 

 and emitting the costulae far from its base ; spiracles circular, apophyses 

 distinct. Abdomen as long as head and thorax, sub-petiolate, deplanate 

 with the anus more or less distinctly compressed, and widest at apex of 

 the second segment ; basal segment bordered, basally bicarinate, strongly 

 and evenly punctate, gradually explanate throughout with distinct spiracles ; 

 terebra rarely shorter than abdomen and very distinctly deflexed. Legs 

 normally slender with the claws not pectinate ; calcaria straight, red and 

 not more than one-fourth the length of the metatarsus. Wings with 

 areolet pentagonal or wanting ; fenestra centrally corneous ; lower angle 

 of the discoidal cell acute. 



This genus is rendered distinct by its very broad head and basal 

 segment, sub-compressed anus and elongate terebra, as well as by its dull 

 and coriaceous sculpture. It has strong Pimplid facies, and Kriechbaumer 

 thought it allied in the structure of its head, antennae and metathorax 

 with the Xoridini ; Bridgman compares it with Atrac/odes, referring to 

 the broad petiole, but he finally thought it most correctly placed between 

 Phygadeiion and Heniiteles ; indeed, he at first doubtfully included Hemi- 

 teles inimicus, and I am very certainly of opinion that this species is 

 correctly here placed, and go so far as to have doubts whether C. gaUicoIa 

 be more than an immaculate variety of it. Dr. Capron, however, placed 

 this genus in the Ophio?nnae, near Cremastifs. 



Both the original species have been bred from galls, where they were 

 probably parasitic upon Tortrkes or Aculeate-Hymenoptera, as also has 

 C. inimicus. 



As Schmiedeknecht truly says, further information respecting this " fast 

 unbekannte und verschellene Gattung " is badly needed ; it is unfortunate 

 that Bridgman did not see fit to supplement his somewhat crude notes at 

 a later date, but this omission I have to some extent been enabled to 

 obviate. 



Tabic of Species. 



(4). I. Head sub-globose ; terebra longer ; ^ 

 pedicellus basally pale. 



(3). 2. Nervellus intercepted below centre ; 



petiole punctate i. Westoni, Bridg. 



(2). 3. Nervellus intercepted in centre ; petiole 



aciculate 2. xvlonomoides, Mori. 



(i). 4. Head sub-transverse ; terebra shorter ; ^ 

 pedicellus immaculate. 



(6). 5. Abdomen of 9 centrally red, of ^ apically 



deplanate 3. inimicus, Grav. 



(5). 6. Abdomen black, of c^ apically sub-com- 

 pressed 4. GALLICOLA, Bridg. 



