26 The Philippine. Journal of Science lais 



Long., incl. tegm., 12 mm.; exp. ant. pronot. process, 5 mm. 

 Hab. Philippine Islands (J. J. Moimsey). 



Allied to 7. erigcns Walk., but differing by the much more slender and 

 less curved pronotal processes, etc. 



Genus TRICENTRTJS Stal 



Tricentrus orcus Buckton. 



Centrotus orcus Buckton, Mon. Memb. (1903), 247, PI. 60, figs. 7, 

 7a, lb; Funkhouser, Phil. Journ. Sci., Sec. D (1915), 10, 390. 



Tricentrus orcus Distant, Ann. & Mag. Nat. Hist. (1916), VIII, 

 17, 390. 



The transfer of this species from the genus Centrotus to the 

 genus Tricentrus was to have been expected. It is very doubtful 

 if the old genus Centrotus as now limited is represented in the 

 Island fauna. 



The species has not been recognized in any of the material 

 studied in connection with this report. The measurements 

 given by Buckton (5x3 mm.) are small for the majority of 

 the species of this genus unless referring only to males. It may 

 be that Buckton had only male specimens before him and that 

 this species may prove to be the opposite sex of some other 

 species described from females. 



Tricentrus pilinervosus Funkhouser. 



Add: Habitat. — Luzon, Benguet, Baguio (Baker). Minda- 

 nao, Davao (Baker), Baker's duplicate Nos. 6307 and 6471. 



Tricentrus attenuatus Funkhouser. 



Add: Habitat. — Mindanao, Davao (Baker), Baker's duplicate 

 No. 6473. 



Tricentrus robustus sp. nov. Plate I, figs. 3 and 4. 



Near Tricentrus fairmairei Stal, but larger and darker and 

 differing principally in the shape and position of the supra- 

 humeral horns, which are larger, more flattened, higher, and 

 directed more dorsad. 



Heavy, robust, very dark brown, thickly punctate, densely 

 pubescent with golden hairs. Suprahumeral horns heavy, later- 

 ally compressed, extending upward and outward. Posterior 

 process short, heavy, suddenly acute at tip, reaching just beyond 

 internal angle of tegmen. Tegmina ferruginous hyaline, base 

 black and punctate, white fascia of body showing through teg- 

 mina just behind base. Position of horns somev/hat variable. 

 Males smaller and darker than females. 



Female. — Head subquadrate, black, convex, delicately ridged 



