368 



The Philippine Journal of Science 



1916 



meral horns has been termed the metopidium (fig. 2, c) .^ Along 

 the median dorsal line of the pronotum is often a distinct ridge, 

 the dorsal carina, which is generally present on the posterior 

 process, if not percurrent. The posterior extension of the pro- 

 notum, which often reaches beyond the tip of the abdomen and 

 sometimes beyond the apex of the tegmen, is known as the 

 posterior process (fig. 2, e) . The relative position of the ocelli 

 and the eyes is a character which is of value for specific, if not 

 for generic, diagnosis. The clypeus (fig. 2, d) in the Mem- 

 bracidse is the sclerite just below the median line of the vertex 



and is usually distinct; the labrum 

 below it is much reduced and generally 

 flattened against the body, so that it is 

 not visible from a front view, thus 

 giving the clypeus a labial appearance. 

 The posterior trochanters in some gen- 

 era show a curious row of teeth along 

 their internal margin (fig. 3). This 

 character is often somewhat difficult to 

 verify, but is most valuable. The tibiae 

 of the forelegs are occasionally flattened or foliaceous (always 

 so in the subfamily Membracinse) , and usually spined. The pres- 

 ence of punctures and pubescence is used in specific descriptions. 



LIST OF SPECIES 



The following check list includes all of the species of the 

 subfamily Centrotinae described from the Islands to date: 



Fig. 3 Armed posterior trochan- 

 ters. 



Centrochares horrificus Westw. 

 Pyrgonota bifoliata Westw. 

 Pyrgonota tumida Stal. 

 Pyrgonota philippina Stal. 

 Pyrgonota bifurca Stal. 

 Pyrgonota semperi Stal. 

 Pyrgonota pinguiturris sp. nov. 

 Leptobelus dama Germ. 

 Lobocentrus zonatus Stal. 

 Dograna falco Buckt. 

 Leptocentrus taurus Fabr. 

 Leptocentrus leucaspis Walk. 

 Leptocentrus reponens Walk. 

 Leptocentms aduncus Buckt. 

 Emphusis bakeri sp. nov. 

 Sertorius erigens Walk. 

 Periaman brevifrons sp. nov. 



Tricentrus convergens Walk. 

 Tricentrus fairmairei Stal. 

 Tricentrus capreoliis Walk. 

 Tricentrus pilinervosus Funkh. 

 Tricentrus plicatus sp. nov. 

 Tricentrus attenuatus sp. nov. 

 Centrotus magellani Fairm. 

 Centrotus dilatatus Walk. 

 Centrotus torcus Buckt. 

 Sipylus crassulus Stal. 

 Sipylus nodipennis Funkh. 

 Centrotoscelus typus Funkh. 

 Ebhul carinatus sp. nov. 

 Gargara luconica Fairm. 

 Gargara pygmaea Walk. 

 Gargara patruelis Stal. 

 Gargara varicolor Stal. 



' Cf. Van Duzee, E. P., Studies in North American Membracidae. 

 Buffalo Soc. Nat. Sci. (1908), 9, 30. 



Bull. 



