434 Philippine Journal of Science i»i» 



18. Chaetodacus pubescens sp. nov. Plate II, fig. 2. 



Chaetodacus scutellatus Bezzi (not of Hendel), Bull. Ent. Research 

 7 (1916) 114. 



Much larger and more pubescent than the preceding species, 

 and moreover distinct on account of the different pattern of 

 thorax, legs, and wings ; it is closely allied to true C. scutellatus 

 Hendel, from Formosa, differing only in the broader frons and 

 in minor details of thoracic and abdominal markings. 



Luzon, Laguna Province, Los Baiios and Mount Maquiling 

 (Baker). Type in Professor Baker's collection. 



Male. — Length of body, 8.5 millimeters ; of wing, 8. It seems 

 to differ from Hendel's description of C. scutellatus in the fol- 

 lowing points : Frons broader, being not twice as long as broad. 

 On back of mesonotum the yellow humeral calli surrounded with 

 reddish, not with black; middle yellow longitudinal stripe 

 broader than lateral ones. Abdomen with black basal bands 

 only on second and third segments; fourth and fifth segments 

 with only a broad black spot on each side. Opaque oval 

 patches of fifth segment distinct ; fifth segment, moreover, longer 

 than usual, being only a little shorter than the two preceding 

 segments together. Legs entirely reddish yellow and quite un- 

 spotted, only the hind tibise being brownish. Apical fuscous 

 spot of costal border broader, extending below to middle of 

 first posterior cell (Plate II, fig. 2) ; no distinct infuscation at 

 lower end of hind cross vein or only a very much less-developed 

 one. Pubescence of body longer than in any of the allied forms. 



Note. — In consequence of my mistake in regard to the Phil- 

 ippine species here described as C. pubescens, the Japanese 

 (and Chinese) species, to which Miyake 15 has recently given the 

 name of Dacus bezzii, is probably the same as the Formosan 

 C. scutellatus Hendel; at least I cannot distinguish them from 

 descriptions and figures. 



III. Genus MELLESIS Bezzi, 1916 



All the species here comprised in the present genus are typical 

 in having a well-developed basal stalk of the abdomen (except 

 M. subsessilis) , an elongated first antennal joint, a mesonotum 

 with interrupted suture and with no prescutellar bristles, and 

 a scutellum with only the apical pair of bristles. They all have 

 nonspinose femora, distinct lower orbital bristles (except M. 

 bioculata) , and well-developed anterior supra-alar bristles. To 



u Bull. Imp. Central Agr. Exp. Sta. Japan 2 (1919) 146, pi. 2, fig. 2. 



