134 PROCEEDINGS OF THE ACADEMY OF [Vol. LXXIV 



tegmina with distinctive venation, spinafcion of the cephalic tibiae 

 and different type of male genitalic devlopment. Nearest actual 

 agreement, however, is with Himerta, the male genitalia being 

 similar in type, but Prohimerta differs in the weakly sulcate vertex, 

 lateral lobes of pronotum which are not longer than high, much 

 larger size, much longer and broader tegmina (with branches of the 

 median vein strongly oblique, as in the genus Phaula Brunner) and 

 spination of the cephalic tibiae. 



Though the dorsal margins of the cephalic tibiae bear a few spines, 

 the sudden constriction beyond the auditory foramina and the male 

 genitalic development show the position of the genus to be in the 

 Group Letanae and not in the Group Ducetiae. 



Genotype.- — Prohimerta annamensis new species. 



Cephalic coxae unarmed. Pronotum with disk flattened and 

 caudal margin broadly convex, the lateral lobes roundly inserted 

 but with angulation distinct, humeral sinus distinct. Vertex 

 weakly sulcate and declivent to the rounded, horizontal distal 

 extremity, which is separated by a considerable gap from the small, 

 erect, rounded frontal fastigium. Male subgenital plate without 

 styles, deeply cleft, with the fingers thus formed nearly parallel. 

 Cephalic tibiae with apert auditory foramina, these members 

 there stout but suddenly constricted beyond; sulcate dorsad 

 bearing a proximo-external, meso-distal-external and on each side 

 a distal very small spine. Pronotum and limbs, except caudal 

 tibiae, rather thickly supplied with very small, stiff, short, erect 

 hairs. Tegmina decidedly wider than pronotal length with 

 branches of median vein strongly oblique. Prosternum unarmed. 

 Mesosternum weakly lobate, metasternum sublobate. 



Prohimerta annamensis new species. Plate XI, figures 17, 18 and 19. 



This is a striking species, due to the conspicuous pale annuli of 

 the dark antennae, the dotted tegmina and dark cephalic feet and 

 caudal tibiae. 



Type: cf; Phuc-Son, Annam. November and December. 



(From H. Fruhstorfer.) [Hebard Collection, Type no. 788.] 



Head with occiput convex. Eyes prominent, globose. Maxil- 

 lary palpi with fourth joint two-thirds as long as third and slightly 

 over half as long as fifth. Pronotal sulci distinct on lateral lobes, 

 principal sulcus indicated on disk by a median Y-shaped impression 

 with arms convex and base short. Tegmina and wings fully de- 

 veloped, extending well beyond apices of caudal femora. Tegmina 

 broad, narrowing very slightly to the broadly rounded apex; 

 ulnar vein reaching sutural margin very slightly beyond median 

 point; median vein sending four oblique branches to that margin. 

 Femora with genicular lobes bispinose, the spines of the median 



