290 ^he Philippine Journal of Science 1917 



than to base ; first abscissa of radius longer than second, second 

 cubital cell very short, both transverse cubitals oblique, second 

 decolored; recurrent nervure joining cubitus far from second 

 cubital cell, intervening vein nearly as long as first abscissa of 

 radius and decolored ; parallel vein inserted far below the middle. 

 Hind Vikings similar to those of Macrostomionella. 

 Luzon Laguna, Los Baiios (coll. Baker). 



Genus COLASTOMION novum 



Eyes of medium size, malar space and cheeks relatively large. 

 Anterior ocellus distinctly farther from the two posterior than 

 the distance between the latter. A narrow area about ocelli, 

 except posteriorly, depressed and striate. Vertex back of ocelli 

 of medium length. Antennae not as long as entire body; scape 

 one and a half times as long as wide; funicle nearly as long as 

 wide and a little less than half the width of scape; flagellar 

 joints slightly more than twice as long as wide. Maxillary palpi 

 slender, barely reaching tegulse; third joint as long as fourth 

 and fifth together, somewhat flattened and expanded apically in 

 side view ; last three joints slender and terete, sixth longer than 

 fifth, fifth more than half length of fourth. Labial palpi un- 

 usually small and short. 



Mesonotum scarcely trilobate, notauli shallow, a little impres- 

 sed anteriorly, posteriorly strongly converging and practically 

 obliterating the posterior median area. Scutellum bifoveate 

 anteriorly. Metanotum medially carinate on basal third, on 

 apical two thirds with a large lozenge-shaped median area ; lateral 

 areas very coarsely and strongly reticulate-rugose; spiracle 

 large, round, and raised on a well-defined umbo. Mesopleura 

 with an oblique crenulated discal furrow on posterior half. 



Radial cell reaching apex of wing. Radius inserted at basal 

 two fifths of the large, deep, subtriangular stigma. First ab- 

 scissa of radius less than half length of second; second cubital 

 cell about twice as long as wide, first transverse cubital very 

 oblique, the second vertical, curved, and decolored. Recurrent 

 vein inserted a short distance from apex of first cubital cell. 

 Submedian cell but slightly longer than median. Parallel vein 

 strongly curved and inserted at lower third. 



Abdomen subpetiolate, longer than head and thorax together, 

 beyond first segment rather broadly elliptical in outline, tergites 

 all much wider than long, the surfaces of third, fourth, fifth, 

 and sixth somewhat swollen before their hind margins ; first and 

 second tergites medially carinate. Second, third, and fourth 

 sutures crenulate, broadly and sharply impressed and somewhat 



