XII, D, 3 Bezzi: Studies in Philippine Diptera, II 115 



118. Mongoma pennipes 0. S. 1887. 



One female from Los Bafios. This delicate midge was first 

 described from Borneo and was subsequently recorded from 

 India, Ceylon, and Java. 



119. Trentepohlia pictipennis sp. nov. 



A pretty species, very near T. speiseri Edwards from Ceylon, 

 but at once distinguished by the different wing pattern. 



Male. — Length of body, 5 millimeters; of wing, 5.7. Head, 

 palpi, and antennae dark brownish, antennae a little paler toward 

 the base. Thorax on dorsum dark reddish brown, darker along 

 the middle line; scutellum and mesophragma brownish; pleurae 

 blackish brown. Halteres pale yellowish, with darker stalk. 

 Abdomen entirely black, even on venter, and a little shining; 

 male genitalia small and black, terminating with two hooks 

 curved upward. Coxae entirely light yellowish, the tarsi dark- 

 ened at end; front and middle femora without bristles at base 

 beneath. Wings long and narrow, pale yellowish along the 

 costa and hyaline, iridescent on the remainder; the brown 

 markings are as figured by Edwards for T. speiseri * with the 

 following differences : The middle brown patch extended over the 

 second longitudinal veih and from it a narrow fuscous border 

 extending along the veins to the end of the anal cell ; the brown 

 apical patch not extended over the first posterior cell, which is 

 hyaline in the middle, and has no clear spot in the middle of the 

 second marginal cell. 



Luzon, Laguna, Mount Maquiling (Baker). 



120. Styxingomyia ceylonica Edw. 1911. 



Specimens of both sexes from Los Bafios and Mount Ma- 

 quiling. This strange insect is recorded from Ceylon, India, and 

 Formosa; it is nearly allied to S. didyma Grimshaw from 

 Hawaii and Java. 



Key to the Philippine species of the genus Libnotes Westwood. 



The genus Libnotes seems to be very rich in endemic species ; 

 those known from the Philippine Islands all have the marginal 

 cross vein elongated, with the exception of L. familiaris, which 

 is also found in Java ; in this last island the opposite is the usual 

 case. No species with punctate or variegated wings occurs in 

 the Philippine Islands, so far as is known. 



*Ann. & Mag. Nat. Hist. (1913), VIII, 12, 204, fig. 2. 



