Manchester Memoirs, VoLxlii.{\ZgZ),No.\\, 31 



pile; the lower three-fourths of the orbits densely covered 

 with a silvery pubescence ; the clypeus covered with 

 a longer and denser silvery pubescence. Ocelli . • . 

 Clypeus stoutly keeled in the middle, its apex slightly 

 projecting ; mandibles yellow ; the teeth black, the part 

 at their base piceous. Scape of the antennae shining, 

 yellow, glabrous ; the flagellum black, and covered with 

 a microscopic down. Pronotum thickly covered with 

 fuscous pubescence ; the mesonotum thickly covered with 

 a microscopic pile ; the depression at the base of the 

 scutellum crenulated ; the post-scutellum closely longitudi- 

 nally punctured ; median segment finely rugosely punctured : 

 the enclosed space at the base with a shallow, somewhat 

 crenulated furrow in its centre ; on either side of this are 

 one short, and four longer, longitudinal keels ; at the sides 

 are a few oblique keels; the apex of the segment has a 

 rounded, slightly oblique slope and is densely covered with 

 white pubescence; its centre with a shallow furrow; its 

 sides with a sharp keel extending from the base to the 

 apex. Propleurae hollowed, glabrous ; the base with three 

 stout, curved keels turned towards the base, and one 

 turned towards the apex ; the mesopleurse alutaceous, 

 densely covered with white pile ; behind the tubercles is a 

 sharp, distinct keel, oblique at the base, then following the 

 edge of the pleurae to the sternum ; immediately behind 

 the yellow mark is a distinct oblique furrow, running to 

 the sternum, where it joins the keel. Metapleurce closely 

 and uniformly obliquely striated, except at the base, where 

 there are, at the top, five longish, and, at the bottom, five 

 shorter stria; ; the two sorts being separated by a space. 

 Legs black; the fore femora broadly yellow at the base 

 and with a line, contracted in the middle, on the outer 

 side at the apex ; the tibiae yellow, black behind ; the tarsi 

 yellow, more or less rufous towards the apex ; the hind 

 tibiae spined ; the middle spines originating from tubercles. 



