NEMATUS SUBBIFIDUS. 139 



laid in a pouch sawn by the ? in one of the teeth of 

 the leaf. 



Seemingly rare in this country. Wimbledon (Bridg- 

 man). 



Continental distribution: Sweden, Germany, Hol- 

 land. 



Obs.Nematus betulce, Thorns., is distinct from this, although he 

 regards it as identical with Retzius' species. Nematus betulce, Yoll. = 

 melanocephalus. 



63. NEMATUS SUBBIFIDUS. 

 PI. XXIII, fig. 1, Saw. 



Nematus subbifidus, Thorns., Hym. Scand , i, 105, 29; Andre, 



Species, i, 225 ; Cat., 24 ;* Br. 

 and Zad., Schr. Ges. Konig., 308. 



Antennae as long as the thorax and abdomen, moderately thick, the 

 third and fourth joints about equal ; black, obscure brown beneath 

 from the second joint. Head densely covered with fuscous pubescence, 

 the vertex thick, semi- shining, the sutures wide, distinct, pentagonal 

 area not clearly denned; antennal fovea large, deep black; the space 

 between the antennae, clypeus, and labrum pale yellowish-white ; the 

 tips of the mandibles piceous ; the palpi long, white ; posterior orbit 

 in part luteous ; apex of clypeus truncated ; labrum roundly trun- 

 cated at the apex. Thorax shining, densely pubescent, black, the 

 tegulas, pronotum, and anterior half of pleurae luteous ; the cenchri 

 clear white, and there is a minute white mark between them ; the 

 metanotum pale at the sides. Wings hyaline, the costa and stigma 

 fuscous black, the former pale at the base ; the first transverse cubital 

 nervure is distinct ; the third cubital cellule is smaller, almost broader 

 than long ; the second recurrent nervure is received considerably in 

 front of the second transverse cubital. Legs luteous, the tarsi paler, 

 the apex of posterior tibiae largely, and the tarsi black ; the tibiae are 

 thickened at the apex, grooved on the inner side, and are a little 

 longer than the tarsi ; calcari short, not reaching to middle of meta- 

 tarsus. Claws with a large tooth. Abdomen short, thick, luteous, 

 the basal segment black in the centre ; the sheath of saw black, 

 projecting. 



Length 2 lines. 



The c? is unknown. 



The nearest related species to subbifidus is N. betulce, 

 which, however, is larger, the wings longer, the colour 

 paler ; the nervures in the hind wings are more widely 

 separated, while the spurs reach to the middle of 

 metatarsus. The antennae in subbifidus are longer 



