112 STUDIES IN AMERICAN EPHYDRIDAE (dIPTERA) 



this character is of value will have to be left for the future tO' 

 determine. On the other hand there is the color pattern and 

 general facies to guide the student who is familiar with this group. 

 The present species may be separated from texana by the more 

 yellowish abdomen with broader bands, and a distinct stripe; the 

 narrower parafacials and the lateral cilia of the male fore femora 

 confined to a single series on the basal third. From flexineuris 

 it may be separated by the course of the second vein besides the 

 other characters given in the description of that species. The 

 females are similar to those of yneridionalis but the face is more 

 sericeous and the abdominal bands more oblique^ besides aver- 

 aging smaller in size. On the whole this species is distinctly 

 lighter in general coloration owing to the less tendency of the 

 irrorations to coalesce — the specimens from Guatemala being 

 very noticeable in this respect. 



Description of Male. — Black; halteres yellow; basal joints of tarsi tawaiy. 

 Frons dark, nearly black, mottled with brown or ochreous; face cinereous to 

 yellowish or sometimes grayish white, sericeous, with yellow spots; in certain 

 aspects seemingly transversely banded with darker shade. Cheeks and clyp- 

 eus concolorous. Mesonotum brownish gray, irrorations but slightly coales- 

 cing; vittae rather distinct. ScuteUum concolorous. Mesopleura indistinctly 

 irrorated, more or less brownish tinged above. Abdominal brown bands 

 rather arcuate, obliquely terminated and dilated medianly; medial stripe well 

 defined. Legs sparsely cinereous. Wings yellowish with cross veins slightly 

 clouded. 



Eyes rather oblique. Frons convex, broader than long. Face slightly 

 longer than broad with few weak bristles; parafacial very narrow. Cheeks 

 three-fourths of height of eyes. Arista with 7 to 10 hairs. Fore femora 

 flattened and obliquely sulcate on apical third beneath; mesal cilia of distinct, 

 flattened, curved bristles (fig. 7) ; lateral series normal, simple but confined to 

 basal fourth; their tibiae not ciliate. Length. — 3.5. mm. 



Female. — Similar with lateral flexor cilia wanting or of a few weak bristles 

 confined to basal part. 



Type.—d' ; Cartago, Costa Rica, Dec. 12, 1909, (P. P. Calvert; 

 sweeping over mud), [A. E. S. Type No. 6091]. Paratypes — 

 1 cf , 1 9 ; topotypical. 



Specimens Examined. — 32 . 



Florida: Bradentown, March 29, (M. C. Van Duzee), 2, [Van D.]; Fort 

 Worth, (Mrs. Slosson), 1, [U. S. N. M.]. 



Guatemala: Gualan, Feb. 15, 1905, 9, (J. S. Iline), [Ohio]; Santa Lucia, 

 Feb. 2, 1905, 1, (J. S. Hine), [Ohio.]. 



Costa Rica: Banana River, 100 ft. alt., Nov. 9, 1909, (P. P. Calvert; 

 sweeping near upper reservoir), 1, [A. E. S.]; Cartago, Oct. 27, 1909, (P. P. 



