NO. 1930. DESCRIPTIONS OF NEW SAWFLIES—ROnWER. 235 



Genus STROMBOCEROS Konow. 



For the time being it seems best to treat the various grouDs as 

 subgenera rather than genera. 



PROSTROMBOCEROS, new subgenus. 



Differs from Eustromboceros Rohwer in the pedicellum being longer 

 than wide; and in the third pleural suture being angulate dorsally, 

 the metepimeron a narrow plate which is rougldy L-shaped. (In 

 Eustromhoceros the third pleural suture is sub angulate ventrally, 

 and is near the central axis of the metapleurae, so the two plates are of 

 nearly the same size. On the metepimeron there is a posterior fold. 

 The posterior coxaB have two processes.) 



Type. — Stromhoceros (Eustromhoceros) melanopterus Rohwer. 



STROMBOCEROS (PROSTROMBOCEROS) PLANIFRONS, new species. 



Male. — Length 5 mm. Elongate, slender; supraclypeal foveas 

 confluent with the large antenna! fovese ; supraclypeal area gently 

 convex; middle fovea represented by a shallow, irregular depres- 

 sion; antennal furrows obsolete; frontal fovese deep, circular in 

 outline, separated from the eye by a distance slightly less than 

 their width; ocellar basin obsolete; postocellar furrow wanting; 

 postocellar area defined laterally by elongate fovese, fully twice as 

 wide as the cephalcaudad length; lateral ocelli well below the 

 supraorbital line; posterior orbits narrow; antennas long, filifonn, 

 pedicellum much longer than wide, and longer than the scape; 

 thorax and legs normal; hypopygidium long, broadly rounded 

 apically; stigma narrow, tapering apically; third cubital cell 

 longer than the second. Black; five basal abdominal segments, 

 four posterior legs (except apical joints of the tarsi), and the anterior 

 legs below coxse and except apical joints of tarsi, reddish-yellow; 

 wings strongly infuse ate; venation black. 



Tjibodas, Mount Gede, Java, altitude 8,000 feet. Males collected 

 by Bryant and Palmer. 



Type.— Cat. No. 14504, U.S.N.M. 



In the absence of the antennal furrows, ocellar basin, and narrow 

 posterior orbits this species differers from the type of Prostromloceros. 



Subgenus STROMBOCERIDEA Rohwer. 

 STROMBOCEROS (STROMBOCERIDEA) ALBIMACULATUS, new species. 



Related to paUidlcornis Rohwer, but the head is rather different, 

 the stigma longer and the marldngs white. 



Female. — Length 6.5 mm. Clypeus very gently, arcuately 

 emarginate; supraclypeal foveae elongate, deep but not sharply 

 defined; supraclypeal area very slightly convex; middle fovea large, 



