E. T. CRESSON, JR. 109 



brown reduced or wanting. Rarely are the olivaceous bands 

 wanting. The specimens from Biscayne Bay and Lake Worth, 

 Florida, may not belong here, and may be a distinct variety. 

 They are shining but marked as this form. 



Drosophila excita Gig.-Tos is probably one of the color 

 varieties of this species. Mr. F. Knab of the U. S. National 

 Museum called my attention to the probability of it being an 

 Ephydrid. 



Specimens Examined. — 99. 



Georgia: Billy's Island, Okeefenokee Swamp, June 1912, 1, [C. U.]; Spring 

 Creek, Decatur Co., July 16-29, 1912, 1, [C. U.]. 



Florida: 1, [A. M. N. H.]; 2, [Wash.]; Biscayne Bay, (A. T. Slosson), 2 

 [U. 8. N. M.]; Bradentownn, March, (M. C. Van Duzee), 4, [Van D.]; Crescent 

 City, April 19, 190S, (Van Duzee), 1, [A. M. N. H.]; Lake Worth (Slosson), 

 1, [U. S. N. i\I.]. 



Texas: Austin, Oct. 6-20, 1901, 4, [Wash.]; 1, [Ivans.]; Oct. 7, 1899, 2, 

 [A. M. N. H.]. 



Arizona: Hot Springs, June 24, (H. S. Barber), 6, [U. S. N. M.]; Bill Wil- 

 liams Fork, August, (F. H. Snow), 14, [Ivans.]. 



Mexico: Frontera, Tabasco, IVIay 9, (C. H. T. Townsend; on moist sand 

 at river edge), 1, [U. S. N. M.]; Guadalajara, Aug. 8, 190.5, (McClendon), 1, 

 [A. N. S. P.]. 



Gu.^temala: Gualan, Feb. 1,5, 1905, 22, (J. S. Hine), [Ohio]; Los Amatcs, 

 June 16-20, 1905, 1, (J. S. Hine), [Ohio]. 



Costa Rica: Filadelfia, Jan. 18, 1910, (P. P. Calvert; muddy bank of Rio 

 Tempisque), 1, [A. E. S.]; Santa Cruz, Rio de la Canas, Jan. 30, 1910, (P. P. 

 Calvert), 5, [A. E. S.]; Cartago, May 25, 1909, (P. P. Calvert; along ditch), 9, 

 [A. E. S.]; Cartago, July 4, 1909, (P. P. Calvert, 1, [A. E. S.]. 



Panama: Canal Zone, (A. H. Jennings), 1, [U. S. N. M.]; Ancon, Canal 

 Zone, Dec. 4, 1909, (S. T. Darhng), 9, [U. S. N. M.]. 



Bermuda Islands: July 29, 1905, (T. Kincaid), 1, [A. X. S. P.]. 



Jamaica: April 1891, (Johnson), 4, [A. N. S. P.]. 



Porto Rico: Mayaguez, Jan. 1899, (A. Busck), 2, [U. S. N. M.]; Utuado, 

 Jan. 1899, (A. Busck), 1, [U. S. N. M.]. 



Paralimna (Phaiosterna) obscura Williston 



1S96. PuruliniNd obscura WiUiston, Trans. Ent. Soc. London, 1890, .391. 



Whether or no this is a distinct species I am not prepared to 

 say, for my scries is hardly extensive enough to show the possible 

 range of variation. However, there seems to be very well marked 

 difference in the amount of opacity. In this form we have no ab- 

 solutely opacjue surfaces unless they arc on the face and pleiu-a. 

 There may be considerable amount of pollen but not of suflicient 

 density to subdue the gloss. Structurally the form does not (hffer 



trans, am. ent. soc, xlii. 



