Mr. G. W. Kiikaldj on Aquatic Rliynchota. 53 



rate it from Sigara, Fabr., and tlie comparatively short 

 posterior petles from tlio long-legged Nychia, Stal. It 

 appears to be most closely related to Corixa, and perhaps is 

 intermediate between that genus and JSychia. 



1. Diaprepocoris barycephala, sp. n. 



Caput subquadratura, basi concava, cum oculis hcmisphrcroideum, 

 oculorum marjiinibus lateralibus interioribus fere parallolis, fore 

 pcrpendicularibiis capitis ad basin, verticom versus leviter diver- 

 gent ibus, basi quam oculonira utroriiravis basi latiore (a super, 

 vis.). Pronotum circiter quadrnplum latius quam lonijius, ruf^u- 

 losum. Scutellum isoscele, non aouminatum. Heraielytra 

 pubescente curtissima instrueta, membranie lobis subajciu.tlihus. 

 Tarsi intermedii uiiguiculis longiores, tarsi tibia^que subaequales. 

 Femora anteriora apieem versus calcare subtruncato instrueta. 



cf milii ignotus. 



2 . Palarura segmentum 1""" (a latere vis.) angustnm, sublunatum ; 

 subtus concavum ; segmentum 2""" augustissimura, convexiuscu- 

 lura, suboylindricura. Capitis frons loagitudiualiter raediatim 

 subcarinata. 



Ilead flavous, wider basally (seen from above) than either 

 of the eyes, dorsal surface roughly square, interior lateral 

 margins of the eyes nearly parallel and almost perpendicular 

 to the base of the head, slightly diverging from the base; 

 base of head concave, slightly sinuate. Head with eyes (seen 

 from above) hemisphferoidal ; eyes fuscous. Pronotum ?iho\xt 

 four times as'wide as long, very finely rugose, brownish black 

 anteriorly (pale where covered by the head), flavescent poste- 

 riorly, lateral margins widely luteous. 



Scutellum flavescent, infuscated, isosceles triangular, very 

 large, lateral margins narrowly black. 



Ilemielytra sordid yellowish (slightly infuscated near the 

 base of the clavus, on the basal half of the coriura, and more 

 or less of the apical half of the membrane), without guttulate 

 or vermiculate markings ; scutellum and heraielytra furnished 

 with short black pubescence. Lobes of membrane subequal. 

 Anterior half of emholium luteous. 



Metanotum black ; dorsal surface of abdomen dark fuscous 

 (varying) ; connexivum dark fuscous anteriorly, paler poste- 

 riorly. PedeSj including ungmculi, luteo-testaceous ; anterior 

 femora armed with a blunt spur near the apex ; intermediate 

 tibijB and tarsi subequal, unguiculi shorter ; intermediate 

 femora with short golden hairs; posterior tibiae and tarsi 

 armed with short concolorous spines. 



Whole ventral surface flavescent testaceous, with very fine 

 short pale yellow pubescence. 



