BHEUMATOTBECHITS. 151 



pronotum dull brownish ochraceous, the latter with a much more 

 indistinct central longitudinal line; mesonotum dull piceous brown, 

 its posterior area black with the margins dull piceous brown ; 

 abdomen above black with dull ochraceous spots in longitudinal 

 subfasciate series, the lateral spots more distinct ; body beneath 

 dull ochraceous, apex of rostrum black ; legs piceous, the bases of 

 the anterior femora dull ochraceous ; structural characters as in 

 generic diagnosis ; head, pronotum, and mesonotum thickly, shortly, 

 obscurely pilose. 



Length (apterous form) 6 millitn. 



Hob. Kumaon. 



Genus RHEUMATOTRECHUS. 



Rheumatotrechus, Kirk. Canad. Ent. xl, p. 452 (1908). 



Type, 11. himalayanus, Kirk. 



Distribution. Northern India. 



" This genus has somewhat the appearance of Ptilomera of the 

 Gerridae, but the legs are much shorter, especially the fore tarsi. 



" Head as in Ptilomera, but the eyes are less oblique, and much 

 less emarginate, the vertex being elongate, and subparallel as far 

 as the articulation of the antennae ; first segment [joint] of the 

 antennas little longer than the second ; labrum [rostrum] much as 

 in Ptilomera. In the apterous form the pronotum is well rounded 

 at the sides, extending laterally much farther than the eyes. The 

 nota and tergites are much as in Ptilomera, but the whole insect is 

 much shorter and broader in proportion, the abdominal sclerites 

 much less elongate, the mesonotum also more rounded laterally. 

 The fore femora are a little incrassate, and are scarcely longer 

 than the tibiae, fore tarsi very short. Middle and hind legs much 

 shorter than in Ptilomera." (Kirkaldy.) 



2925. Rheumatotrechus Mmalayanus, Kirk. Canad. Ent. xl, p. 452 

 (1908). 



" Pale castaneous or fulvous ; head with an elongate oval mark 

 on vertex (the interior castaneous) and some lateral marks, dark 

 fuscous. Apex of first segment and apical fourth of second dark 

 fuscous.* Eyes dark. Last segment of labium black. Pronotum 

 dark castaneous ; a central line and a lateral sinuous one on each 

 side yellow, the central one narrowly and rather obscurely 

 margined with black, this spreading out a little apically. The 

 mesonotum has a small, subtriangular, fuscous mark on each side 

 subanteriorly. Legs yellowish fulvous, apex of the tibiae and the 

 tarsi blackish. Tergites dark castaneous, verging on piceous on 



* This presumably refers to the joints of the antennae. 



