292 The Philippine Journal of Science im 



smooth. Mesopleura smooth and shining, with a very broad, 

 short, longitudinal furrow on posterior half below the middle, 

 from the anterior end of which a narrower furrow curves down- 

 ward and forward ; both of these furrows irregularly and partially 

 crenulate. 



Abdomen longer than head and thorax together, subpetiolate, 

 subelliptical in outline; third, fourth, and fifth tergites widest; 

 first tergite long, more than twice as wide at apex as at base 

 and slightly longer than second tergite ; first and second tergites 

 with strong median carinse ; third to sixth tergites much broader 

 than long, third shortest, all swollen and with strongly constricted 

 sutures; third, fourth, and fifth sutures strongly crenulate; first 

 and second tergites coarsely, longitudinally, reticulate-rugose; 

 third and fourth punctate-rugose on basal two thirds, becoming 

 only sparsely punctate on the shining apical third ; fifth shining 

 and subobsoletely and sparsely punctate; sixth smooth and 

 shining. Hind tibiae with two stout, curved spurs which are as 

 long as fourth tarsal joint. 



Stigma large, twice as long as wide, lower margin obtuse, 

 angulate at middle where the radius is inserted; first abscissa 

 of radius about half length of second; second cubital cell twice 

 as long as wide, first transverse cubital oblique, second vertical ; 

 recurrent vein inserted near the first transverse cubital; inter- 

 vening vein decolored; parallel vein inserted below. In hind 

 wings the radius is subobsolete; nervellus oblique. 



Luzon, Laguna, Mount Banahao (coll. Baker). 



Genus MACROSTOMION Szepligeti 



Difi'ers from the new genus Macrostomionella, in Philippine 

 species, as follows : Metanotum without lateral prominences, but 

 with an indistinct, lanceolate, median area; spiracles circular; 

 median carina of abdominal tergites extending to middle of 

 fourth segment. The enlarged maxillary-palpus joints flattened, 

 fourth joint more or less strongly twisted ; stylate sixth joint with 

 distinctly marked pseudojoints. Vertex back of ocelli long. 

 Second cubital cell more strongly narrowed to apex. 



The above note, as well as the descriptions of the species that 

 follow, will indicate that our Philippine species agree with 

 previously described species of the genus except in characters 

 of scarcely more than specific value. 



Macrostomion debilis sp. nov. 



Ochraceous throughout; legs, antennae, palpi, and tegulae paler; 

 lateral lobes of mesonotum and abdominal tergites somewhat 



