Manchester Memoirs, Vol. xliii. (1899), No. 3. 169 



mark becomes narrowed gradually but distinctly, then 

 becomes dilated into a triangle, which at its apex, is 

 slightly wider than the widest part of the basal portion ; 

 the lateral marks are slightly wider than the central ; 

 they are as long as the basal part of the central mark ; 

 slightly dilated in the middle on the outer side, and 

 oblique at the apex. Scutellum pyramidal ; the top with 

 a short, transverse keel-like projection ; the lateral keels 

 large, leaf-like and of nearly equal height throughout. The 

 postcutellum with the sides bluntly keeled. Median 

 segment smooth ; the central basal area almost square ; 

 from its centre and apex two stout keels run to the sides 

 where they unite with a longitudinal keel, thus forming 

 two lateral areae on each side. Pleurae very smooth and 

 shining ; on the metapleurae is a curved keel in the middle. 

 Legs stout, thickly covered with fulvous hair ; on the 

 apical third of the hind femora, on the inner side at the 

 top, is a black mark, which is dilated below on the lower 

 side ; the base of the hinder tibiae, the extreme base of the 

 tarsi and their apical joint, black; the apices of the four 

 anterior claws are black. Wings hyaline, the apices of both 

 smoky; the nervures and stigma black; the areolet 

 triangular, slightly appendiculated ; the recurrent nervure 

 is received almost in the middle. The first and second 

 segments of the abdomen are smooth and shining; the keel 

 on the sides of the petiole extends to the middle — to the 

 base of the black dot ; the transverse, curved furrow on the 

 second segment is longitudinally striated ; those on the 

 other segments are also striated, but not so distinctly. The 

 black marks on the petiole small, on the second segment 

 slightly larger and dilated in the middle at the apex; on 

 the third and fourth larger, on the fifth and sixth still larger, 

 broader, being distinctly broader than they are long ; on 

 the sixth small and may be absent ; the s-ikth has a wide. 



