308 ^^6 Philippine Journal of Science 1917 



This species is similar to M. mindanaensis in most respects, 

 but is strikingly distinct in the structure of its mesopleura. 



Genus TRIGONOPHATNTJS Cameron 



Synopsis of the species. 



a*. Antennae and stigma piceous nigricornis sp. nov. 



a-. Antennae and stigma pale ochraceous philippinensis sp. nov. 



Trigonophatnus nigricornis sp. nov. 



Ochraceous, slightly darker on abdominal tergites, ovipositor 

 concolorous ; interocellar area and antennae piceous, scape paler ; 

 wings faintly obscured, stigma and veins piceous, except de- 

 colored second transverse cubital and transverse median. 



Female, length, 6 millimeters; ovipositor very short, about as 

 long as sixth tergite. 



Head viewed from above with the medium-sized eyes strongly 

 bulging; vertex back of ocelli long, roundly narrowed back of 

 eyes ; length of exposed cheek margin nearly as great as distance 

 from ocelli to occipital carina, the occipital carina very strongly 

 curved; surface of vertex smooth and shining; ocelli small, far- 

 ther from eyes than from each other, about four times as far 

 from occipital carina as from each other, with short radiating 

 striae about the anterior ocellus. Face short, broader than long, 

 broader above, due to the fact that the eyes are deeply emargin- 

 ate opposite antennae ; surface with a median carina to near cly- 

 peus, lateral areae cross-striate, more strongly so above; mouth 

 opening very large, subcircular, the upper margin thus strongly 

 curved. Head viewed from side with face margin curved and 

 strongly projecting at antennal scrobes; malar space rather 

 small, length about half width of eye ; cheek very broad, broader 

 than length of malar space and slightly broader above than 

 below, the margin subparallel to eye margin; ocelli rather 

 strongly projecting; eye outline short and broadly subelliptical ; 

 maxillary palpi slender and very hairy, six- jointed, first two 

 joints short, remainder subequal in length; labial palpi four- 

 jointed. 



Mesonotum smooth and shining ; notauli very deep, broad, and 

 coarsely crenulated anteriorly, becoming much smaller and 

 weaker, disappearing in the posterior median depression, which 

 has a small median groove. Scutellum with two subcircular 

 foveae anteriorly, which are separated by a sharp carina and 

 are smooth within; posterior disk of scutellum smooth. Meta- 

 notum with six or eight discal striae on posterior half, which 

 converge at apical border; at the side above the large round 



