LIFE-HISTORIES OF SAWPLIES. 243 



Crabro Pterotus, Panzer (mas). 



Length 4|- lines. Exp. alar. 6 lines. Head black, closely 

 and moderately finely punctured; stemraata in a curve; 

 clypeus and inner orbits with silvery pubescence ; mandibles 

 ferruginous in middle. Antennae with flagellum broadly 

 filiform, flaltish ; first seven joints ferruginous beneath, 

 last four and scape entirely black. Thorax slightly pubes- 

 cent, diffusely and strongly punctured. Anteriorly a slight 

 depression, in the centre of which is an elevated line, and 

 two shorter ones laterally. Metathorax very coarsely rugose ; 

 sculellum smooth, with a few fine punctures. Femora black, 

 n)iddle pair with a broad yellow streak above ; lower margin 

 quite smooth, not denticulate, as in C. patellatus. Tibiae 

 yellow, anterior pair dilated into a convesco-concave plate, 

 which is black, and streaked with well-marked whitish radi- 

 ating lines. Posterior pairs with a slight ferruginous stain in 

 the middle above. Tarsi yellow, with last joint fuscous. 

 Anterior pair dilated, and last joint produced into a triangular 

 plate, having two short acute spines, one pointing forwards 

 and the other backwards. Abdomen elongate-ovate, black ; 

 second segment with a roundish yellow macula, having some- 

 times a black centre, and forming a nearly perfect circle on each 

 side, and a semilunate yellow patch laterally and towards the 

 apex of the third segment. Hab. Shore, Surrey, July, 1878. 

 Shere, near Guildford, October 15, 1878. 



LIFE-HISTORIES OF SAWFLIES. 

 Translated from the Dutch of Dr. S. C. Snellen van Vollenhoven, 



By J. W. May. 



(Continued from vol. X., p. 279.) 



Cryptocampus angustus, Hart. 



{Hartig, Blatt und Holzwespen, p. 222, No. 1.) 



Cryptocampus niger, in latere nitidissinius, antennis in mare 

 elongatis brunneis, supra fuscis, in femina brevioribus 

 lotis nigris, alarum stigmate bicolore, pedibus dilute 

 fulvis, coxis, femorutn basi et tarsorum ultimis articiilis 

 nigris. 



As an appendix to the description of the previous species,* 

 which lives in excrescences on the leaves, 1 add the his- 

 tories — very imperfect, it is true — of two species of sawflies, 



Nematus Lugdunensis, Yoll. 



