8 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 74 



in the keys given herein. All the material in the Baker collection, 

 now a part of the collections of the United States National Museum, 

 has been u^ed in connection with this paper. 



KEY TO THE SPBCIES 



1. Frons with only the outer, outwardly curved, vertical bristles present, and 



these veiy weak ; thickened part of arista about 1.5 as long as third an- 

 tennal segment, the apical hairlike portion about one-third as long as the 

 wide portion ; head and thorax fulvous yellow, scutellum violet-blue, 



slightly wrinkled on sides bisetosus, new species. 



Frons with four quite strong and distinct vertical bristles ; the wide part 

 of arista but little longer than third antennal segment, the apical hair-like 

 part fully half as long as the wide part ; scutellum distinctly wrinkled 

 on most of its surface 2. 



2. Face with a black mark between each antenna and eye 3. 



Face without a black mark between each antenna and eye 4. 



3. Both thorax and abdomen fulvous yellow, with distinct violet tinge ; apical 



portion of arista not as long as the wide basal part, the latter not as wide 



as third antennal segment puncticeps, new species. 



Thorax fulvous yellow, with slight violet or blue tinge, the scutellum entirely 

 metallic blue; apical part of arista at least as long as the wide basal part, 

 the latter as wide as third antennal segment aurora Karsch. 



4. Species entirely testaceous in color, no conspicuous blue tinge present ; 



cheek with a blue mark below eye diflacilis Malloch. 



Thorax fulvous, with a distinct blue tinge, scutellum metallic blue. 



obtectus Dalmann. 



CELYPHUS PUNCTICEPS, nev> species 



Male and female. — Testaceous yellow, with a very pronounced vio- 

 let-blue tinge on entire dorsum; the face with a deep black spot 

 between each antenna and eye. 



Structurally similar to obtectu^, but the arista narrower at base. 

 Scutellum irregularly punctured basally as in ohtectus. 



Length, 5 mm. 



Type, male, allotype, and two paratypes, Singapore, Straits Settle- 

 ments; poft^atypes, one, Penang; two, Porto Princess, Palawan (C. F. 

 Baker. 



Type.—C2.t. No. 41083, U.S.N.M. 



This species appears to be close to karschi Bigot, but without an 

 examination of the type specimens it is impossible to be certain of 

 most of the species described by the older authors. 



CELYPHUS BISETOSUS, new species 



Female. — Head and thorax shining fulvous yellow, with a faint 

 bluish tinge; scutellum dark metallic violet-blue; abdomen dark 

 castaneous above, yellow below. Antennae fulvous yellow; palpi 

 yellow at bases, deep black on the apical broadened portions. Legs 

 fulvous yellow, femora darker, fore pair brown. Wings yellowish 

 hyaline. Halteres dull yellow. 



