112 NEMATUS LEUCOGASTER. 



body about. As I have reared the imago in July 

 from larvae collected in June it is probable that there 

 are two broods in the year. The single cocoon is 

 spun in the earth. 



The flies appear in April, May, and June, and 

 possibly, as above explained, in July and August. 



They are tolerably common. In Scotland I have 

 taken them in Clydesdale, Moffat, Perthshire, Aber- 

 deenshire, Inverness-shire, Ross-shire, and Sutherland- 

 shire. I have seen English specimens from New- 

 castle (Bold), Manchester, Norwich, St. Albans, the 

 London district, Glanville's Wootton, Exeter, and 

 Gloucester. 



The species was discovered in Iceland by Stau- 

 dinger. It has since been found in Sweden and 

 Germany. 



43. NEMATUS LEUCOGASTER. 

 PL XX, fig. 4, Saw. 



Nematus leucogaster, Htg., S. E. Z., 1840, 23, 19; Andre, 

 Species, i, 179 ; Cat.,* 19, 114; Br.and 

 Zad., Schr. Ges. Konig.,xxiv, 151,134; 

 Dbm., Consp., 9, 88. 



punctulatus, Dbm., 1. c., 9, 89 ; Thorns., Opus., 626, 27 ; 



Hym., Scand.,i, 117,42; Cam., Fauna, 

 35, 27. 



cuUtalis, Dbm., 1. c., 9, 90. 



hypoleucus, Foer., Verh. Yer. Rheinl., xi, 304', tab. v, 



fig. 19 (wing). 



Black, shining, vertex almost opaque, finely punctured, the sutures 

 and pentagonal area distinct ; mesonotum with a few scattered punc- 

 turee; clypeus, labrum, palpi, tegulse, pronotum at the sides, belly, 

 extreme apex of abdomen, trochanters and tibia3, white ; the rest 

 of the legs reddish, except the base of coxa3, apex of posterior tibia3, 

 and the tarsi, which are blackish. Antennae nearly as long as the 

 body, tapering considerably towards the apex, the third and fourth 

 joints equal. Calcaria long, the cerci projecting outwards and in- 

 wards over the saw, the sheath of which is black. Wings hyaline, with 

 a fuscous tinge towards the apical half ; the costa white, stigma fuscous ; 

 the first transverse cubital nervure is distinct, although faint ; the third 

 cellule is one fourth longer than broad, the second recurrent nervure is 

 received a little in front of the second transverse cubital or almost 

 joined to it. 



Length 3 3| lines. 



