388 The Philippine Journal of Science 192s 



tarsal joint very short, the second being slightly longer than the 

 first; all these tarsi without claws. 



In the female, abdomen with the lateral margins rolled up 

 and sometimes in contact with each other at the central axis, so 

 that the morphological dorsal side of the abdomen is invisible; 

 anal segment forming a thin-walled tubelike structure with 

 lateral sides pointed posteriorly. 



Type, Rhyacobates takahashii sp. nov. 



This genus is somewhat allied to Jucundus Distant, but differs 

 from it in the shape of the head, the considerable length of the 

 first joint of the antennae and of the intermediate and posterior 

 femora, the apical spine of the anterior tibiae, the fringe of long 

 hairs on the intermediate tibiae, the structure of the inter- 

 mediate and posterior tarsi, and the peculiar abdominal struc- 

 ture in the female. Only the apterous form is known. 

 Bhyacobates takahashii sp. nov. Plate 1. 



Head longer than broad between the eyes, dark brown above, 

 pale yellowish brown beneath, with a somewhat fork-shaped 

 central black fascia on vertex which is bifurcate posteriorly; 

 eyes large, prominent, and black, antennae not longer than body, 

 black, with first joint slightly thicker and much longer than the 

 three other joints together, second and fourth joints subequal in 

 length, third slightly longer; rostrum scarcely passing anterior 

 coxae, with apex of third segment and entire fourth segment 

 black. 



Pronotum much shorter than head, anterior margin straight, 

 posterior slightly concave; shining black above with a large 

 central brown spot touching posterior margin ; prosternum pale 

 yellowish brown, posterior lateral sides silver gray pubescent. 

 Meso- and metanotum together somewhat globose, shining black, 

 with a longitudinal dark brown fascia and somewhat indistinct 

 lateral silver gray striae, posterior ends of striae somewhat thick- 

 ened on mesonotum, and a thin silver gray stria on the central 

 axis of metanotum. Meso- and metasternum silver gray, thickly 

 pubescent. 



Anterior acetabulae, coxae, trochanters, and femora brown; a 

 spot on the acetabulae, apical end of trochanters, and two longi- 

 tudinal lines on anterior and lateral sides of femora black ; tibiae 

 and tarsi black, base of former brown. Trochanters coarsely 

 downy; femora very much thickened, much longer than tibiae, 

 the last with a distinct apical spine ; first tarsi distinctly longer 



