Manchester Memoirs, Vol. xliii. (1899), No. 3. 199 



punctured ; the middle beyond these is broadly smooth ; 

 the sides stoutly irregularly transversely striated ; at the 

 sides of the apex is a stout somewhat Y-shaped keel, the 

 outer fork of which is larger and more curved, the tail of 

 the Y being continued down to the lower side of the petiole. 

 Propleurae punctured above, the lower part smooth, the 

 middle coarsely striated. The middle and upper part of 

 the mesopleurae smooth, except for some fine keels behind 

 the tubercles, where they are depressed ; the lower part 

 obscurely punctured and covered with long, white hairs ; 

 the tubercles are large ; the furrow at the apex bears some 

 stout keels. Metapleurse closely punctured, more closely 

 at the base, where there is an oblique keel, which unites 

 with the outer corner of the spiracular area ; the latter is 

 triangular at the apex, at the base its keels are oblique. 

 Wings hyaline, except for the apical cloud ; the nervures 

 and stigma black ; the transverse basal and the recurrent 

 nervures interstitial ; the latter has two large bullae, its 

 centre being thus completely separated from the lower and 

 upper portions. The four anterior legs are rufo-testaceous ; 

 the hinder pair entirely deep black, and covered thickly 

 with black hair ; their calcaria are rufo-testaceous. Ab- 

 domen smooth, rufous ; the apex more or less blackish, 



Macrogaster LUTEUS, Sp. nov. 



Luteus, nigromaculatus ; antennis nigris ; alis kyalinis, 

 nervis stigmateque nigris. $ . 



Long. 8-9 mm. 



Antennae black, becoming brownish towards the apex ; 

 the under side of the scape clear, of the base of the fla- 

 gellum obscure, yellow; the scape thickly covered with 

 long, the flagellum much more thickly with shorter, 

 fuscous hair. Face strongly punctured, thickly covered 

 with short, fuscous hair ; the middle above broadly carinate ; 



