Cecidonomus?^ BRITISH ICHNEUMONS. 1 75 



I. Westoni, Bridg. 



Ht-mileles ptiintatiis, Ratz. Ichn. d. Forst. ii. 127, 6 (?). Cecidouomus U'cstoui, 

 Bridg. Entom. 1880, p. 264; Schm. Term. Fuz. 1897, p. 561, i ?. 



Head black, dull and coarsely coriaceous ; face convex with dense 

 griseous pubescence ; cheeks and temples buccate ; vertex very broad. 

 Antennae about two-thirds the length of the body ; filiform, with the basal 

 joints ferrugineous beneath. Thorax black, coarsely coriaceous and 

 pubescent throughout ; notauli obsolete, though extending to the scutellar 

 fovea ; metathorax coarsely wrinkled with distinct upper areae ; areola 

 elongate-triangular, shorter in c? , emitting the often wanting costulae be- 

 yond its centre. Scutellum short, dull and sub-deplanate. Abdomen 

 black, coarsely, closely and evenly punctate throughout, and somewhat 

 dull ; terebra slightly longer than the abdomen. Legs red, with the apices 

 of the intermediate tarsi darker ; apices of the hind femora and tarsi, with 

 more or less of their spinulose tibiae, infuscate ; $ with coxae, except the 

 apices of the anterior, black. Wings hyaline ; areolet pentagonal, a little 

 produced internally ; nervellus post-furcal and intercepted slightly below 

 the centre. Length, 4--6 mm. 



I have seen both sexes with the basal incisures more or less rufescent. 



Mr. Weston bred fifteen males and nine females from galls of Cyiiips 

 Kolhiri in 1878--9. It is not an uncommon species in Britain, though not 

 yet recognized on the Continent. Maldon in Essex (Fitch) ; several at 

 Shere (Capron) ; Greenings, Surrey, in June (W. Saunders). Tuck has 

 given me two females which he captured at Tostock in Suffolk, on 20th 

 July, I goo ; and I took others on the window of Monks' Soham House, 

 on 5th August, 1905. 



2. xylonomoides, sp. 7i. 



Head black and rugosely coriaceous, very strongly buccate, with the 

 frons convex and temples sub-intumescent above the eyes. Antennae 

 sub-filiform and about two-thirds the length of the body. Thorax roughly 

 coriaceous ; mesonotum discally deplanate, with notauli deeply impressed 

 though not sharply defined, anteriorly prominent and sharply declived ; 

 metathoracic areae indistinct though traceable, areola elongate-triangular, 

 with its apex truncated by the strong transverse ridge. Scutellum short, 

 dull and sub-deplanate. Abdomen sub-cylindrical, dull, pubescent and 

 distinctly punctate, with the two basal segments sub-strigose and all the 

 incisures red. Legs pubescent, black, with the tibiae except the infuscate 

 apices of the posterior, and the base of the front tarsi, testaceous. \Vings 

 hyaline ; stigma piceous with whitish base, radix stramineous ; areolet 

 pentagonal, a little produced internally, with the outer nervure sub- 

 obsolete J nervellus sub -opposite and intercepted centrally. Length, 

 5 mm. (J only. 



This species is very closely allied with the c^ of C. ]]'estoni, from which 

 the more intumescent head and mesonotum, weaker metathoracic areae, 

 pale tibiae and slightly more strongly produced areolet will serve to dis- 

 tinguish it. These points and the stout transverse metathoracic ridge 

 give it stronger rimplid facies than is presented by either of Hridgman's 

 species. The petiole, too, is slightly less contracted basally. 



