xin, D, 3 Bergroth: Philippine Heteroptera, I 123 



Islands. It has been redescribed by Distant under the name 

 Nacebtis dux. The differences in "the structure of the head 

 and thorax," alleged by Distant to exist between his and Bred- 

 din's genus and species, are not evident to me. He has prob- 

 ably not understood Breddin's description, which is written in 

 German. Distant's description, although not quite exact in all 

 details, is better than usual, but his statement "rostrum reaching 

 the intermediate coxse" is quite wrong. The rostrum is never 

 so long in any gerrid, the distance between the fore and middle 

 coxae being very long in this family. In Rhagadotarsus the 

 rostrum is extended somewhat beyond the fore coxse, but does 

 not by far reach the middle coxse. 



ACANTHIAD^ 



Acanthia balnearum sp. nov. 



Oblong-oval (male) or oval (female) , including elytra a little 

 over two times (male) or not quite two times (female) longer 

 than broad, subglabrous, black; exocorium (excepting two spots 

 behind the middle, one in the emboiium and the other in the 

 adjacent area, and apical margin of emboiium) , one spot before 

 and five spots behind middle of mesocorium, a (sometimes in- 

 distinct) subapical spot to clavus, and extreme apical margin 

 of ventral segments white ; apical border of last female segment 

 broadly whitish, apical margin of head narrowly testaceous, 

 membrane whitish, sometimes a little smoky here and there, the 

 three interior cells with a blackish spot behind the middle, the 

 veins fuscous-black; antennje fuscous-black, first, and sometimes 

 second, joint very obscurely testaceous ; rostrum piceous or dark 

 testaceous; legs whitish testaceous, coxse and extreme apex of 

 tibise and of tarsal joints blackish, femora often more or less 

 infuscated in their apical half; very slightly shining, more so 

 beneath, clavus and in fresh well-preserved specimens corium 

 (excluding exocorium and the white spots) quite dull, velvet- 

 like. Head considerably broader than apex of pronotum, anten- 

 nse about half the length of body (including elytra), vdthout 

 exserted hairs, first joint scarcely as long as the shortest dis- 

 tance between the eyes, second less than twice the length of first, 

 third slightly shorter than second and a little longer than fourth. 

 Pronotum three times broader than long in the middle and about 

 one-half broader than head, apical margin slightly shorter than 

 the almost straight lateral margins, the transverse^impression 

 in its median part distinctly more distant from apical than from 

 basal margin, the anterior lobe with a transverse median fovea. 



154239 4 



