538 Mr. P. Cameron's descriptions of ten new 



the 3rcl joint distinctly shorter than 4th. Frontal area 

 distinct, bluntly rounded at the apical angle, almost oval, 

 the apex very slightly indented by the large deep and 

 well-defined antennal fovea. Front sharply projecting; 

 clypeus broadly but not deeply incised. Spurs as long as 

 the cerci. Posterior tarsi and apex of tibiae infuscated. 

 The blotch is very large. Wings hyaline ; costa and 

 stigma yellowish-white ; tegulae of the same colour ; 3rd 

 cubital cellule much longer than broad, and nearly 

 double the width of the base at the apex. Claws sub- 

 bifid. Length, 2f lines. 



The only British species with which it has any re- 

 semblance in coloration is leiicogaster, bat that species 

 may be known from it by its shorter, thicker antennae, 

 punctured head, black metapleura, base of coxae, and 

 fuscous stigma. 



Bare. Clydesdale, on rose. 



Nematus maculiger, n. s. 



Nematus lacteus, var. b., Thoms., Hymen. Scand. i., 

 155, 88. 



Pale yellowish-white ; head darker, more testaceous ; a 

 large mark on vertex extending to base of antennae, a 

 large mark on breast, and the whole of meso-metanotum 

 and back of abdomen (except at junction of segments), 

 black ; apex of hinder tibiae and tarsi blackish. Antennae 

 short, filiform, black above, brownish beneath ; the 

 3rd and 4th joints subequal. Spurs about one-third of the 

 length of metatarsus, and not much longer than cerci. 



The male has thicker, more pilose, and longer antennae ; 

 the mark on vertex is larger, more extended laterally 

 and behind ; the mesothorax is entirely black, as well as 

 the whole upper part of the body. The basal half of 

 hind tibiae and tarsi black; stigma griseous. Length, 

 2|— 3^ lines. 



Very closely allied to N. lacteus, Thoms., but some- 

 what smaller ; the antennae are shorter, with the 3rd 

 • joint shorter compared to the 4th, and they are lighter 

 coloured . on lower side ; the black mark on vertex is 

 wider at the sides, and continued on either side to the 

 antennae and in the middle to the antennal fovea ; be- 

 hind it is usually more distinctly narrowed than the 

 middle portion ; the breast is black ; the spurs shorter ; 

 the head, too, is more narrowed behind the eyes. 



