306 ^^6 Philippine Journal of Science wia 



merely "individual varieties" of the same Palawan stock, it would 

 be possible for a breeder in the course of time to sort them out 

 and colonize each one on a separate island, producing what would 

 then be regarded, by all ordinary rules, as two perfectly dis- 

 tinct species. On the other hand, we do not know without 

 further inquiry that these forms have not already been ecologi- 

 cally isolated in some way, or are mutually infertile and now 

 specifically distinct. The local collector, obtaining good series, 

 especially of the males, may be able to decide. 

 The type of C. morawitzii came from China. 



Ceratina fuliginosa sp. nov. 



Female. — Length, about 9 millimeters; black, marked with 

 yellow in the same manner as C. philippinensis, but the greater 

 part of labrum and mandibles yellow ; frontal spots little diverg- 

 ing ; yellow of upper border of prothorax separated from that of 

 tubercles; mesopleura anteriorly with a very broad, vertical 

 yellow band, constricted in middle ; posterior face of metathorax 

 all yellow except triangular basal inclosure; middle and hind 

 tibiae and tarsi without yellow ; yellow band on second abdominal 

 segment broad and continuous, of equal width throughout; a 

 narrow apical band on fourth segment, but that on second is 

 basal, as well as that on third. Wings dusky, the marginal cell 

 and beyond strongly fuliginous ; scape with the lower half yellow 

 in front ; underside of abdomen largely pale ; coxse, especially the 

 hind ones, marked with yellow; on underside of thorax yellow 

 bands start from middle coxae and extend forward, converging 

 to the middle line. Mesothorax densely punctured anteriorly. 



Palawan, Puerto Princesa {Baker 3838). 



A very distinct species, somewhat related to C. ridleyi CklL, 

 from Singapore, but easily known by the partly fuliginous 

 wings and other characters. 



Ceratina tropica Crawford. 



Apparently widespread; specimens come from Los Baiios, 

 Luzon {Baker A), and Dapitan, Mindanao {Baker 3130, 3132). 

 The type locality is Manila.^ 



Ceratina flavolateralis sp. nov. Fig. la. 



Male. — Length, about 8 millimeters; shining, bright chrome 

 yellow, with the following parts black: Vertex, middle of front, 

 upper part of supraclypeal area (the supraclypeal mark is very 

 broadly triangular), mesothorax (except a broad yellow band 



'See Proc. U. S. Nat. Mus. (1911), 38, 119; (1911), 39, 636. 



