304 2^^6 Philippine Journal of Science isie 



Subgenus Pithitis Klug 



Ceratina sexmaculata Smith. 



Apparently common at Los Banos (Baker 307, 3659). I have 

 it also from India and Formosa. 



Subgenus Ceratinidia Cockerell and Porter 



Key to the species. 

 a^. Males. 



b^. Clypeus dark, with a very broad transverse light bar, which has a 



median rounded lobe above tropica Crawford. 



b'. Clypeus all, or nearly all, yellow. 



c\ Cheeks, occiput, pleura, and legs entirely yellow., fiavolateralis Ckll. 

 c'. Cheeks dark, with a yellow stripe. 

 d^. Flagellum long, pale yellowish fulvous beneath, except the apex, 



which is broadly black benguetensis Ckll. 



cf . Flagellum short, dark. 



e\ Scape only partly light in front; yellow border of prothorax 



entire philippinensis Ashm. 



e^ Scape wholly light in front; yellow border of prothorax in- 

 terrupted compacta Sm. 



a*. Females. 

 f. Lateral face marks divided. 



g\ Lateral face marks each divided into two spots.... tropica Crawford. 

 g\ Lateral face marks divided, but the upper part elongated. 



philippinensis humilior Ckll. 

 f. Lateral face marks forming continuous bands. 



h^. Marginal cell and region beyond fuliginous; pleura with a large 



vertical yellow band, constricted in middle fuliginosa Ckll. 



K'. Marginal cell not fuliginous; pleura without a vertical band, 

 i*. Pleura with a yellow spot behind the tubercles. 



philippinensis Ashm. 

 'P. Pleura entirely black philippinensis nigrolateralis Ckll. 



Ceratina philippinensis Ashmead. 



The records of C. hieroglyphica Smith from the Philippines 

 doubtless refer to this species, which is very closely allied. 

 Ceratina philippinensis appears to be common at Los Baiios 

 {Baker 5) ; but it also occurs at Baguio, Benguet {Baker ^■OOd) ; 

 Butuan, Butuan, Mindanao {Baker 3653) ; Cagayan, Mindanao 

 {Baker 3654^) ; and on the Cuernos Mountains, Negros {Baker 

 3131 ) . CeratinM compacta Smith was described from a supposed 

 female from the Philippine Islands, but the description agrees 

 almost exactly with the male of C. philippinensis. The only 

 apparent differences are indicated in the preceding key to the 

 species. Ceratina compacta was doubtless a male, and it is very 

 probable that it is specifically identical with philippinensis, in 

 which case it has priority. 



