Zo. 
an 
Pronotum obseure yellow, blackened medially. Mesonotum shiny black; 
in some cases the humeral region of the praescutum obscure yellow; lateral 
margins of the praescutum very narrowly yellowish. Pleura brownish 
black, shiny, with a conspicuous, ventral, obscure yellow area that is 
densely covered with a microscopic appressed pubescence that appears like 
a bloom when viewed obliquely from above; this area extends from behind 
the fore coxa to dorsal of the mid-coxa. Halteres pale brown, the base of 
the stem and the knobs yellow. Legs with the fore coxae obscure yellow; 
mid-coxae yellow, the base extensively infuscated; posterior coxae with 
the outer face infuscated; trochanters obscure yellow; remainder of the 
legs black. Wings with a faint brownish tinge; stigma conspicuous, oval, 
dark brown; veins dark brown. Venation: Sc short, SeZ ending just 
before the origin of Rs, Sc? apparently atrophied; cell first M2 open by 
atrophy of m; basal deflection of Cui close before the fork of M. 
Abdomen black, the ventral lobes of the hypopygium brownish yellow. 
Habitat—Hawaiian Islands. 
Holotype, male, Kaumuahona, Oahu, November 23, 1919 
CBE Bryan, Jr). 
Allotype, female, Southeast Koolau Mountains, Oahu, Feb- 
ruary 11, 1917 (J. C. Bridwell). 
Paratypes, female, Wahiawa, Oahu, October 31, 1920 (O. H. 
Swezey); male, Waihee, Maui, September 4, 1919 (E. H. 
Bryan, Jr.). 
This handsome little fly is readily told by the shiny black 
coloration and the open cell first M2. 
Styringomyia didyma Grimshaw. 
The following records are available in this. material: 
Oahu: Central Y. M. C. A., Honolulu, February 16, 1922 
(William A. Meinecke) ; one pair, taken in copula. 
Hawan: Honaunau, August 13, 1919 (O. H. Swezey). 
Trimicra pilipes (Fabricius). 
Mr. F. W. Edwards believes that most, if not all, of the rather 
numerous described species of the genus are synonyms or varie- 
ties of the common T. pilipes. There can be no doubt but that 
the total number of valid species is much less than has gener- 
ally been supposed. The Hawaiian records have been listed 
hitherto as 7. lateralis Grimshaw. The following observations 
are available: 
Kauai: Kaholuamano, April, 1920 (J. A. Kusche ). 
Hawaii: Honaunau, June, 1919 (J. G. Stokes). 
