Manchester Memoirs^ Vol. xliii. ( 1 899), No. 3. 1 87 



running from the base to the scutellum ; the base of the 

 marks being somewhat triangularly dilated. Scutellum 

 and postscutellum yellow ; the scutellum raised, sparsely 

 punctured ; the depression at the base of the former 

 deep, smooth ; the postscutellum smooth. The median 

 segment yellow, a large, black, hourglass-shaped mark 

 down its centre ; the basal part being longer and wider 

 than the apical ; the basal half of the segment is strongly, 

 somewhat rugosely, punctured ; above and touching the 

 stigma is a black mark which reaches the base of the 

 segment, becoming narrowed as it does so. Legs rufo- 

 fulvous ; the fore coxae and trochanters entirely, the 

 middle coxae yellow, marked with rufo-fulvous behind ; 

 the hind coxae black, yellow above, except for a large 

 black mark in the middle, extending from the base to the 

 apex, becoming gradually wider as it does so ; the hinder 

 tarsi infuscated. Wings clear hyaline, except for a large 

 fusco-violaceous mark at the apex, extending almost 

 equally on both sides of the apex of the radial nervure ; 

 the areolet is distinctly petiolated ; slightly oblique ; the 

 recurrent nervure is received very shortly beyond the 

 middle of the cellule. Abdomen black ; closely and 

 strongly punctured ; the apices of the first to the fifth 

 segments banded with yellow ; the sixth yellow at the 

 sides only, the middle of it being rufous ; the last two 

 segments are entirely rufous, narrowly lined with yellow 

 at the apices ; the ventral segments, except the apical, 

 yellowish. 



The $ is similar to the ? in coloration, except that 

 the hinder femora are of a clearer yellow colour, and 

 broadly marked with black ; the hinder tarsi are blackish ; 

 the antennae are as long as the body, the flagellum more 

 brownish, and with the joints dilated at their apices ; the 

 black mark on the median segment is narrowed in the 



