HEMIPTERA 165 



Ocelli present. Membrane without basal cells ; with four veins, the interior vein 

 furcate. Femora scarcely incrassate, not spinose. Abdominal segments all attaining 

 the lateral margins of the body, ventrally. Last three visible spiracles (on fifth, sixth, 

 and seventh segments) situated ventrally near the lateral margins of the abdomen. 



Metrarga F. B. White. 

 Metrarga F. B. White, 1878, Ann. Mag. Nat. Hist. (5) i. p. 370. 



Confined to the Hawaiian Isles. 



Lightly pubescent. More or less elongate-ovate ; above plane, somewhat convex 

 beneath. Head subquadrilateral, anteriorly produced ; and compressed, strongly con- 

 vexly elevate. Tylus prominent, arched exteriorly in front of the juga. Vertex 

 destitute of a sulcus in front of the ocelli, which are a little nearer to the eyes than to 

 one another and close to the base of the head. Eyes small, oblique, not touching 

 pronotum. Antenniferous tubercles exteriorly strongly spined. First segment of 

 antennae always extending well beyond apex of head. Rostrum reaching at least to 

 posterior coxae, first segment reaching about to the base of head. Pronotum punctured, 

 transverse, lateral margins carinately subacute, sinuate ; latero-posterior angles callosely 

 prominent ; base subtruncate. Scutellum punctured, a little longer than wide ; tricarinate, 

 radiating from the centre (as in Nysiits). Sterna punctured, abdomen smooth. Con- 

 nexivum subvertical. Elytra minutely, not strongly, punctured, aviimissitra clavi shorter 

 than the scutellum ; costal margin more or less rotundate, explanate, subreflexed, 

 extending laterally well beyond the abdomen ; apical margin of corium strongly sinuate, 

 exterior angle acutely produced, not reaching beyond apex of abdomen. Legs moderate ; 

 coxae not remote ; femora subequal, scarcely incrassate, not spinose. Stink orifices 

 large, auriculate. 



^. Abdominal segments beneath subparallel, straight, the sixth and seventh 

 apically more or less roundly emarginate, sometimes almost straight. 



%. Abdominal segments beneath : second to fifth subparallel, straight, sixth to 

 seventh angularly (sometimes profoundly so) emarginate. 



1. Pronotum toothed anterolaterally (/) nuda W'hite. 



\a. Pronotum rounded anterolaterally 2. 



2. Membrane large, extending considerably beyond apex of corium, nervures 



distinct ; postei ior femora stout ( j) contractu Blackb. 



ia. Membrane small, scarcely extending beyond apex of corium, nervures mdistinct ; 



posterior femora slight (^) vit/osa White. 



(i) IMetrarga mida. White. 



Metravga nuda F. B. White, 1878, Ann. Mag. Nat. Hist. (5) i. p. 371. 

 = .'' M. obsciira Blackburn, 1888, Proc. Linn. Soc. N. S. W. (2) in. p. 347. 



