NO. 19C0. SYXOPSIS OF XEOTROriCAL UMyODiyjE—ALEXAyDElt. 535 



R3+3 short but longer than M,; basal dofloction of R.,+5 distiiut, as 

 long as r-^m; basal deflection of Cu, slightly bej^ond the fork of M; 

 Cu, +M3 about equal to Cu, beyond M3. (See fig. 5.) 



Abdomen: tergum, dark brown; sternum, lighter colored. 



Hahitat.—IIoloiype.—Msle, Tukeit, British Guiana, July •_'(), 1911 

 (coll. Lutz). 



Type. — In American ^luseum of Natural History. 



Differs from all of the knowTi sj^ecies in the extreme recession of 

 the cross-vein r. 



POLYMERA GRISEA. new species. 



Size, small; flagellar segments of the antemiie bi-nodosc; cell ril, 

 present; dark pleural stripe narrow, distinct; wings gray. 



Male. — Length, 3-3.5 mm. (about) ; wing, 4.6; antenna, 7.5 (about). 



Related to alhitarsis WiUiston in its general coloration and vena- 

 tion but very mucli smaller. In the dark narrow pleural stripe it 

 agrees weU with Wifliston's description.' The wings are slightly 

 grayish, not brown; basal segments of the antennsB dark brown; the 

 legs are lacking excepting one of the fore pair. (See fig. 6.) 



Habitat. — Uolotype. — Male, Ancon, Canal Zone, Panama (A. H. 

 Jennings coll.). 



Type. — In U. S. National Museum collection (No. 14937). 



Genus EPIPHRAGM A Oslen Sacken. 



Epiphragma Ostex 8ackex, Proc. Acad. Xat. 8ci. Phila., 1859, p. 238; Mono- 

 graphs, vol. 4, lS(i9, p. 193; Studies, etc., pt. 2, 1887, p. 208. 

 Tills well-defmed genus reaches its maximum of species in tropical 

 America. Several of the species that have untfl now been character- 

 ized as "Limnohia" are undoubtedly Epiphragmaj and I treat them as 

 such in this paper. 



KEY TO THE SPECIES OF EPIPHRAGMA. 



1. \\ings with complete unicolorous fascia, brown or wliite, extending across the 



\ring 2. 



Wings vrilh ocellate marks, or pale-margined spots, or incomplete fasciae 3. 



2. White fascise about three; brown fasciic, as a rule, not connected; tip of tibia? 



dark fascipennis Say ^ (East. U. S.). 



A single white fascia across the middle of the wing, owing to the confluence of the 

 two brown fasciae on either side; tip of tibiae light yellow, 



itnitans, new species (Bolivia). 



3. Ground color of the wing dark brown or rusty-browTi 4. 



Groimd color of the wing pale brown, gray, subhyaline or hyaline 6. 



4. Thoracic dorsum velvety black, with a bright yellow, very conspicuous, spot, 



histrio Schiner^ (Colombia). 

 Thoracic dorsimi not velvety-black and yellow o. 



' Dipt. St. Vincent, Trans. Ent. Soc. Lond., 1890, pp. 296, 297. 

 ' Osten Sacken, Monographs, vol. 4, 1869, p. 194, male and female. 

 ' Reise A'orora, Dipt., 186S, p. 41; male. 



