300 The Philippine Journal of Science 



basali, puncto impressis; sternito abdominali primo secundoque 

 irregulariter transverse punctatis, meso-episternis solum in di- 

 midia parte anteriore punctatis ; tarsis articulo primo extrinsecus 

 haud sulcato. Long. 22, lat. 9 mm. 



Luzon (Schadenberg) , Laguna Province, Mount Maquiling 

 (Baker). For particulars see the following key: 



Synopsis of the Philippine Trigonotomini. 10 



1 (12). Third antennal joint as long as or longer than first, antennae 



not geniculate ; labrum and epistomum truncate, hardly sinuate. 



2 (3). Lateral margin of metasternal episternum longer than its front 



margin; posterior angles of prothorax usually very obtuse (no 

 Philippine species known )..._ Triplogenius Chaud. s. str. 



3 (2). Lateral margin of metasternal episternum not longer than its front 



margin; posterior angles of prothorax sharply rectangular. 



Triplogenius subg. Lesticus. 



4 (7). Dorsal intervals of elytra convex. 



5 (6). Head and prothorax metallic green; elytra greenish black, nearly 



parallel sided; subscutellar stripe three to four times the 

 length of scutellum; length, 25.5 millimeters. 



T. (L.) prasinus Tschitsch. 



6 (5). Head and prothorax like the ovate elytra uniform violaceous; 



subscutellar stripe hardly more than twice the length of scu- 

 tellum; basal impressions of prothorax finely punctate; length, 

 25 millimeters T. (L.) busuangae sp. nov. 



7 (4). Dorsal intervals of elytra flat. 



8 (9). Upper side violaceous or bluish green; upper side of first poste- 



rior tarsal joint outwardly sulcate; subscutellar stripe distinct, 

 confluent with the first stria ; basal furrow of elytra consisting 

 only of the short incurvate basal part of the lateral furrow which 

 does not reach fifth stria; length, 23.5 to 24 millimeters. 



T. (L.) insignis philippinicus Kuntzen. 



9 (8). Upper side cupreous. 



10 (11). Lateral margin of elytra concolorous, prothorax sometimes green- 



ish; abdomen smooth, intermediate episterna nearly entirely 



punctate, posterior episterna entirely so; length, 17 millimeters. 



T. (L.) mac-gregori Kuntzen. 



11 (10). Lateral margin like prothorax and the remaining upper side 



uniform cupreous; first and second ventral segments with 

 irregular transverse rows of punctures; intermediate episterna 

 punctate, in the anterior half only; subscutellar stripe very 

 indistinct; first joint of posterior tarsi without a lateral furrow; 

 length, 20 to 22 millimeters T. (L.) cupreatus sp. nov. 



12 (1). Third antennal joint much shorter than first, antennae geniculate; 



labrum and epistomum strongly sinuate Trigonotoma Dej. 



"In the Catalogue of Philippine Coleoptera, Manila (1915) 13, the 

 author confuses the tribe of Trigonomini (not Trigonominae) with Pteros- 

 tichini; these are both tribes of the family Harpalidae. 



