164 HYMENOPTERA OF SARAWAK. 



inf uscated at the apex ; the 1st recurrent nervure is straight, 

 not oblique in front, the 2nd roundly curved at the top and 

 bottom ; the 2nd transverse cubital is straight and oblique by 

 sloped at top and bottom, the lower (and larger) abscissa having a 

 more oblique slope than the upper ; the 2nd abscissa of the cubi- 

 tus is distinctly less in length than the 3rd and 4th united 

 the apical abscissa of the radius roundly, obliquely curved. 

 Pronotum rounded. 



Comes close to D.Jlmbriata, Bur., which may be known 

 from it by the middle of the pronotum being transverse, not 

 rounded, by the 2nd abscissa of the cubitus being longer than 

 the apical two united, by the recurrent nervures not being so 

 widely separated and by the transverse median nervure being 

 more rounded, not obliquely sloped above. 



Megachile Wallacei, sp. nov. 



Black, the hair on the metanotum, base of 1st abdominal 

 segment, a band on the 2nd and the whole of the apical two 

 segments above covered with whitish hair ; the ventral slope 

 bright red ; the wings hyaline, the apex slightly clouded, the 

 nervures and stigma black ; the hair on the legs black ; the 

 basal 4 joints of the hind tarsi covered with bright red hair. 9 . 



Length 18 mm. 



Hab. Trusean. August. 



Vertex distinctly punctured, more strongly and closely in 

 the centre than oh the sides ; the face similarly punctured, 

 more closely above than below ; the clypeus more strongly 

 punctured; the lower part with the punctures more widely 

 separated and the apex impunctate. Mandibles strongly, but 

 not closely punctured ; they have 3 teeth ; the apical is the 

 longer ; the 2nd shorter and bluntly rounded ; the 3rd not so 

 clearly separated, longer, broader and blunter. Mesonotum 

 closely and clearly punctured, the punctures round and in 

 places running into reticulations ; the base in the centre is less 

 strongly punctured and furrowed narrowly. Scutellum more 

 strongly and similarly punctured. Metanotum smooth. Meso- 

 pleurse closely and distinctly punctured ; the meta much more 



Jour Straits Branch 



