812 R. I. POCOCK 



2U. Ortliiom.ori>lia mix'ancla, sp. a. 



(Fig. 13). 



Colour variegated ; head piceous ; antennae fuscous with basal 

 half of the 2"*^ segment and the 1^' fulvous; 1** tergite black 

 at the sides, with a median posteriorly broader and weakly 

 divided stripe; the rest of the terga piceous above, the keels 

 ilavous or fulvous and a reddish yellow stripe on each side of 

 the middle line, these stripes extending on to the cylindrical 

 area; anal somite yellow above, fuscous at the sides, valves 

 fuscous ; tlie sides of the other somites black immediately beneath 

 the keels, but the lower two thirds of their surface, like the legs 

 and sternal areas fulvous or brunneous. 



Antennae of moderate length, slightly incrassate, segments 2-6 

 subequal in length. Budy moderately robust, 1^^ terf/i(e as wide 

 as the head, with a small depressed keel ; keel of the 2^^'^ below 

 the edge of the 1*^ and the keel of the 3"^. Keels of the rest 

 above the middle of the side, horizontal or slightly elevated 

 posteriorly, the posterior angles from the 2'''^ to the 19"' acute 

 and spiniform and projecting past the line of the posterior 

 border of the tergite; lateral margins feebly thickened, not 

 toothed, anterior angle very convex, anterior border reduced to 

 a minimum, posterior border oblique, lightly concave, scarcely 

 rising in front of the posterior border of tlie tergite; transverse 

 sulcus deep, strong, not sculptured, the anterior sulcus finely 

 beaded; faint traces of a longitudinal sulcus. Tail triangular, 

 truncate, normally tubercular; anal sternite convexly triangular, 

 the tubercle just surpassing the border. Lateral surface of the 

 segments finely granular at the anterior end of the body, smooth 

 behind; the inferior crest tuberculiform on segments 2-4, mo- 

 derately strong posteriorly on segments 5-9, but visible after- 

 wards only as a low eminence. Sternal areas normally sulcate, 

 the last deeply notched so that the distance between the posterior 

 legs is about equal to the length of one of the coxae. 



