164 ^Ir. W. L. Distant on Undescrihed Genera and 



To'incavellius galapagoensis. (Plate II, fig-, l.) 

 Seioeoris gedapagoensis. Butl., Proc. Zool. Soc, 1877, 

 p. 88, Q. 1. 



Halntat. Galapagos Isles, Charles Island (\V. E. Cook- 

 son — Brit. Mas.). 



Sul .family PENT A TOMIN^. 

 Halyabbas, gen. nov. 

 Body ovate, narrowing to apex, dejiressed towards head from near 

 base of pronotum. Head large, triangular, almost in a line with 

 the lateral margins of the pronotum, lateral lobes very broad at 

 base, narrowing to apex and meeting a little in front of central 

 lobe ; ocelli almost as far from each other as from eyes ; rostrum 

 reaching base of abdomen, second joint a little shorter in length than 

 the third ; antennfe five-jointed, first joint not nearly reaching the 

 apex of head, second joint a little the longest; third, fourth and 

 fifth subequal in length. Pronotum about twice wider than long, 

 lateral margins obliquely straight, very slightly crenulate near eyes, 

 posterior angles obtusely subprominent, posterior margin truncate. 

 Scutellum broad at base, somewhat suddenly narrowed at about 

 one-third before apex, which is rounded and reaches base of mem- 

 brane. Corium with the lateral margins obliquely convex, the 

 apical margins convexly rounded. Memljrane with numerous longi- 

 tudinal veins. 



This genus, by the shape and size of the head, may be 

 placed in the vicinity of MenesfJicus. 



Halyabbas unicolor, sp. n. (Plate II, fig. 2.) 



Greenish or ocliraceous ; thickly punctate above, most finely so 

 on corium ; antennae, legs, and rostrum greenish- ochraceous, 

 stigmatal spots black. Sternum coarsely punctate ; abdomen very 

 fineh- punctate. 



Long. 16-17 millim. Exp. pronot. ang. 9-10 millim. 



Hcdiitat. LOMBOK (Everett — Brit. Mus.) ; Siam (Brit. 



Mus.). 



DoRPius, gen. nov. 



Body elongate, subovate, underneath moderately convex. Head 

 ovate, lateral margins laminate, slightly recurved upwardly, lateral 

 lobes a little longer than the central. Rostrum reaching the inter- 

 mediate coxiP. Antennae with the third joint \'ery short, not mucli 

 more than half the length of second joint. Pronotum with the 

 lateral margins convexly laminate, slightly recurved ujiwardly. 



