128 NEMATUS SALICIVORUS. 



running through the spiracles. The cerci are black, 

 as well as the space immediately behind them. 



It feeds on alder, and is double brooded. Probably 

 common, but confounded with the other green species. 

 It is parthenogenetic, only males being yielded by the 

 eggs laid by virgin females. 



Clydesdale, Worcester. 



06s. This species is certainly the JV. oligospinus of Brischke and 

 Zaddach, but I am not sure as to its being the oligospinus of Foerster 

 (Yerh. Y. pr. Rhein., xi, 312). The description of the latter in point of 

 fact will suit two or three species, and I therefore do not care to adopt 

 it. Brischke (1. c.) furthermore quotes N. validicornis, Foerster, as a 

 synonym, but this is alike disproved by Foerster's description as by 

 the description of its larva given by Kaltenbach (Pfl. 579). I have 

 examined specimens of both sexes of validicornis in the collection of 

 the latter, and can hardly distinguish them from JV. curtispina. 



56. NEMATUS SALIOIYORUS. 



Vol. I, PL VII, fig. 8, lar. ; Vol. II, PI. Ill, fig. 5, ? ; 

 PL YIII, fig. 7, lar. ; PL XXI, fig. 8, Saw. 



Nematus salicivorus, Cam., E. M. M., xviii, 194 (1882). 



Pale testaceous-green, the space surrounding the ocelli, continued as 

 a small rounded mark behind, a broad band on middle lobe, a longer 

 narrower one on lateral lobes, with a small dot on inner side at apex, a 

 mark on either side of scutellum, the space between the cenchri (sepa- 

 rated in the middle), black ; one or two fuscous transverse marks on 

 base of abdomen. Antennae slender, filiform, as long as the body, 

 black, fuscous beneath ; the third joint slightly shorter than fourth. 

 Head slightly narrowed behind the eyes, broadly rounded in front, but 

 retreating on the outer side of antennae, and projecting, but not sharply, 

 between them ; frontal area well marked, its lower end curved in the 

 centre through the upper part of the large, distinct, oval, antennal 

 fovea projecting into it ; furrows on vertex distinct, but not reaching 

 to the base ; no central furrow. Clypeus with a shallow indentation. 

 Cerci as long as posterior spurs. 



Length 2 3 lines. 



Of similar size and coloration (except that the black 

 markings are less developed) to N. miliaris and gluti- 

 nosce, but differing from both in having the head much 

 more swollen in front, the part between the antenna3 

 being bluntly rounded, and not furrowed in the centre, 

 the frontal area is less raised, and not truncated at the 



