NEW MALAYAN WASPS OF THE SUBFAMILY PSENIN;£ 

 By S. A. Rohwer 

 Honorary Custodian of Hymenoptera, United States National Museum 

 In a recent paper x I described fourteen species of psenid wasps 

 from the Philippines. Since that paper was prepared, Prof. C. 

 P. Baker has forwarded other species of the subfamily Pseninae ; 

 most of these were undescribed, and many of them came from 

 the Philippines. With the descriptions here presented the num- 

 ber of Philippine species of this subfamily totals twenty-one. a 

 very creditable number considering the area of the Islands. 

 More collecting will, however, undoubtedly produce additional 

 undescribed forms, and field observations will aid greatly in 



Genus DIODONTTJS Curtis 

 The following three new species run to couplet 6 in my key ■ 

 and may be separated as follows : 



6. Petiole longer than hind femora, concolorous with gaster; area outside 



lateral ocelli depressed D. philippinensis Rohwer. 



Petiole subequal in length with hind femora, concolorous with gaster; 

 area around ocelli not depressed; no 1 



Petiole black; area around ocelli not depressed; 



below antennae 



6 a . Petiole not sharply separated from rest of tergite ; inclosure of pro- 

 podeum longer and with strong carina?; face narrower. 



D. dapitanensis sp. nov. 

 Petiole sharply separated from rest of tergite; propodeal inclosure 



shorter and with close carina; face broader- 6*. 



6 b . Antenna slender, the joints not rounded out; face not strongly narrow- 

 ing; propodeum beyond inclosure punctured. 



D. basilanensis Rohwer. 

 Antenna with joints rounded out; eyes strongly converging below; 



dorsal part of propodeum smooth... D antennatus sp. nov. 



Diodontus penangensis sp. nov. 



Female.— Length, 6.5 millimeters. Clypeus convex, the ante- 

 rior margin bidentate medianly; face closely punctured, convex 



'Philip. Journ. Sci. 18 (1921) 309. Separates received in Washington, 



