xirr, D, 2 Bergroth: Philippine Heteroptera, I 59 



middle, the radial sector starting from the radius far before its 

 middle, then running parallel to it, ending abruptly a little be- 

 hind middle of corium, costal border somewhat reflected, apical 

 margin straight, as long as claval suture. Orificia directed 

 obliquely outward and forward, oval, callosely margined, and 

 subauriculate. Posterior border of the metapleura laminately 

 depressed, strongly widening outward, apical angle more or less 

 rounded. Abdomen more or less strongly and transversely 

 convex beneath, somewhat compressed, much more so in the 

 female, a little (male), or somewhat more (female), passing 

 apical angle of corium; fourth and fifth ventral segments with 

 two dark sublateral glandular spots, one behind the other; last 

 male dorsal segment roundly produced in the middle. Fore 

 femora not incrassated, unarmed. First joint of hind tarsi a 

 little longer than the others united. 



Type of the genus, Rhiobia praeceps sp. nov. 



This genus is allied to Ischnorhynchus Fieb., from which it 

 differs principally by the structure of the pronotum and 

 scutellum. 



In the normal position of the female ventral segments in this 

 and some other genera the middle of the fourth and fifth seg- 

 ments is not visible, being drawn in under the third segment 

 so that the sixth reaches the apical margin of the third and is 

 extended forward beyond the middle of the venter. But the 

 female in these genera is capable of pushing out the fourth and 

 fifth segments, and if it happens to die at the moment they are 

 pushed out (as is the case in one of the females before me) , these 

 segments remain fully visible also in the middle, and the sixth 

 segment takes a much more acclivous position, not extending 

 to the middle of the venter. The characters taken from 

 the length and position of the last three female ventral seg- 

 ments ought, therefore, to be used with some caution. 



Rhiobia praeceps sp. nov. 



Glabrous, dull, stramineous, the punctation fuscous, meso- and 

 metapleura and venter, and sometimes pronotum, more or less 

 tinged with ferruginous, a small humeral spot and a small basal 

 median spot to pronotum fuscous, corium almost colorless but a 

 subbasal spot, a rather large, triangular, anteriorly transversely 

 truncate spot occupying the apical angle (except the extreme 

 apex) , the posterior part of the radial vein and the apical margin 

 (except a rather broad breach in the interior half) dark brown, 

 the interior margin and commissure of the clavus and the me- 

 dian fissure of the sixth female ventral segment blackish, a 



154235 2 



