22,6 Rohwer: New Malayan Wasps 599 



hind legs beyond coxae testaceous; head with the usual silvery 

 pubescence; wings hyaline, venation pale brown. 



Type locality. — Basilan Island. 



Described from one male received from C. F. Baker under 

 his number 16826. 



Type. — Catalogue No. 25043, United States National Museum. 



Diodontus davanus sp. nov. 



Very like Diodontus luzonensis Rohwer, but that species lacks 

 the transverse ridge below the antennae. 



Male.— Length, 7 millimeters. Anterior margin of clypeus 

 produced medianly into a low, rather narrow, emarginate pro- 

 cess; transverse ridge below antennas strong, gently curved 

 laterally and medianly joining the equally prominent frontal 

 ridge; inner margins of eyes converging toward clypeus but 

 closer together opposite insertion of antennas; frons and vertex 

 shining; ocelli in a low triangle; postocellar line subequal with 

 ocellocular line; antennas nearly as long as head and thorax, 

 joints 7 to 12 rounded out beneath, joints 3 and 4 subequal; 

 pronotum strongly carinate anteriorly, lateral anterior angles 

 rounded ; scutum shining, with a few well-separated punctures ; 

 notauli present on about anterior half; suture in front of 

 scutellum foveolate; dorsal surface of propodeum polished, the 

 basal area triangular in outline and with strong rugae which are 

 well separated medianly ; median channel deep and well denned ; 

 posterior face of propodeum coarsely reticulate ; mesepisternum 

 polished, the suture not foveolate; petiole evenly curved, cylin- 

 drical, subequal in length with hind femur and well separated 

 from rest of tergite; gaster polished; first recurrent received in 

 second cubital very close to first intercubitus ; second recurrent 

 bisinuate, received in third cubital cell a distance slightly less 

 than half the length of second intercubitus from base of cell; 

 second cubital cell one-third longer below. Head black, man- 

 dibles and scape yellow; flagellum brownish above, testaceous 

 beneath; thorax yellow; anterior part of pronotum, spot below 

 tegula, posterior part of mesepisternum, metapleura, three spots 

 on scutum, narrow line before scutellum, and base of propodeum 

 as well as propodeal furrow black; base of petiole yellowish, 

 its apex brownish; gaster rufous; legs rufous-testaceous; head 

 with usual silvery hair; wings hyaline, venation brown. 



Type locality.— Davao, Mindanao. 



Described from one male received from C. F. Baker. 



Type.— Catalogue No. 25044, United States National Museum. 



