270 

 Notes on Two Species of Hawaiian Diptera. 



Ll.IXdWOIiJ 



The student of diptera has a rich fiekl in Hawaii. ^laiiy 

 of the native species are ap])arently new; and the literature 

 of the Islands, often, hardly nu^itions some introduced fly 

 which is very al)nndant. Tho latter is the case with the two 

 species recorded in this pa2:)cr. 



Br((rln/(J('u{crf( (ir(jcii/ala Walk. 



Hah. Southern United States as far as Kansas ; Cuba, 

 Brazil, Bolivia, and Paraguay. 



Ilairalian records. First specimen obtained by Dr. Per- 

 kins at Olaa, Hawaii, July, 189,5. Dr. Howard, Oct. 1900, 

 records three specimens -from Hawaii, and a single specimen 

 was taken in the Tao Valley, ^Nfaui, Sept. 1901. 



Of the specimens in collections, the Hawaiian Sugar Plant- 

 ers' Association has two specimens taken on Molokai, 1907, and 

 four at Waikiki, 1906 and 1907. The College of Hawaii col- 

 lection has one specimen, 1911, and five specimens, 1914, 



The indication would be that these flies are rare, but I 

 found them exceedingly abundant, after the recent heavy rains, 

 both at the College of Hawaii and along the Palolo stream. 

 Those at the College were found under the insectary, in the 

 water basins, which had not been cleaned out for some time. 

 The water was brown in color, and had considerable leaf-trash 

 in the bottom. 



These flies, as is characteristic of the fanulv, have a water- 

 proof coat and run about freely u])on the surface. 



TIahlts of Jar vac: The larvae are able to remain submerged 

 for indefinite periods, while feeding, but as soon as they finish 

 they rise and apply their caudal spiracles to the surface of the 

 water, where they hang motionless. The food is apparently 

 the same as that calcn liy mos(|uito larvae. They were ob- 

 served eating the remains of a sowbug which was decaying 



Proc. Haw. Ent. Soc. Ill, No. 4, Mav, 19i: 



