FAM. EMPIDID/E 137 
12, L. tubenifera, Bezzi, Ann. Mus. Hungar. Vol. 3, p. 435. f. 1(1905); Nova Peru. 
Acta Akad. Naturf. Halle, Vol. 91, p. 340 (1909). 
13. L. violacea, Loew. Berl. Ent. Zeitschr. Vol. 13, p. 32 : Cent. 8, No. 55 Mexico. 
[1869] (Empis); Wheeler & Melander, Biol. Centr. Amer. Dipt. 
Suppl. p. 367 (1901); Melander, Trans. Amer. Ent. Soc. Vol. 28, 
p. 278, pl. 8, f. 103, 104 (1902); Bezzi, Ann. Mus. Hungar. Vol. 3, 
P. 434. 459 (1905); Nova Acta Akad. Naturf. Halle, Vol. 9t, p. 340 
(1909). 
14. L. viridis, Coquillett, Proc. U. S. Nat. Mus. Vol. 18, p. 395 [1895] Jamaica. 
(Hilara) ; Melander, Trans. Amer. Ent. Soc. Vol. 28, p. 269 [1902] 
(Hilara); Cockerell| Ent. News Philad. Vol. 36, p. 49 (1903); 
Coquillett, Proc. Ent. Soc. Wash. Vol. 5, p. 264 (1903); Bezzi, 
Ann. Mus. Hungar. Vol. 3, p. 434, 459 (1905); Nova Acta Akad. 
Naturf. Halle, Vol. 91, p. 341 (1909). 
25. GENUS PORPHYROCHROA, NOV. GEN. 
Characters. — Metallic steel-blue slender species, with long yellow legs. Eyes large, bare, 
facets uniform, the emargination at antennz short and narrow; front very narrow, sides parallel, vertex 
filled by the ocellar triangle, face almost obliterated, only a linear indication at the oral edge; antennz 
located well up on the head, the front being half as long as the face, long and slender, basal joints 
shining, the first joint cylindrical with apical setule, the second joint pyriform and loosely setulose, the 
third joint velvety, long conical, narrow, only a little tapering, indistinctly ending in a long thick 
cylindrical style which is nearly as long as the remainder of the antenna, its outer third a more slender 
segment; proboscis slender, pointed, rigid, thick only at extreme base where the labella is developed 
into lateral flaps; palpi minute, visible only as a black point; two erect parallel proclinate vertical bristles, 
one pair of proclinate ocellar, two frontal bristles arranged one before the other. Thorax not pubescent, 
five reclinate dorsocentral bristles then an interruption to the proclinate prescutellar pair, no 
acrostichals, one humeral, two or three supraalar setula, four scutellar bristles, metapleure with a few 
setulae. Abdomen depressed, sparsely hairy; pygidium terminal, penis thick but visible at base only, 
middle valves large. Legs simple, slender, hairy, middle tibiae with two apical bristles, hind tibize with 
terminal pecten. Wings with strong anal angle, no costal bristle, costa abruptly interrupted beyond 
third vein, a crease in the membrane beneath the humeral crossvein, auxiliary vein almost contiguous 
with first vein, evanescent at middle of costal cell, anal crossvein recurved, forming an angle of 
140 degrees with anal vein which passes into a fold beyond anal cell, marginal cilia of two lengths, some 
shorter and some longer than the anterior crossvein which is located well toward the base of the complete 
discal cell, three complete veins issuing from the discal cell of which the anterior two are weak; 
calypteres with long cilia. 3 
Tyne species : P. jalliata, Coquillett. This was originally described as belonging to Sciodromia. 
Later Coquillett referred the species to Microphorus. The genus is much more closely related to 
Rhamfphomyia than to either of these, but differs in the high-placed antenne with lengthened first joint 
and arista. Other tropical species of Rham?Aomyia resemble falliata in possessing metallic coloration. 
The description and the figure of the genus were obtained from the type specimen in the U. S. National 
Museum. 
Geographical distribution. 
1. P. falliata, Coquillett, Jour. New York Ent. Soc. Vol. 10, p. 140 [1902] Mexico. 
(Sciodromia); Proc. Ent. Soc. Wash. Vol. 5, p. 264 [1903] (Microphorus); 
Bezzi, Ann. Mus. Hungar. Vol. 3, p. 460 [1905] (Microphorus). 
— PI. 2, Fig. 12. 
