A4 
Canon City, Colo.; Las Cruces, N. Mex.; Washington; Los 
Angeles and San Diego counties, Cal.; and Allende, Mexico. 
(Insecta Saundersiana, Vol. I, p. 260; 1856: Hyalomyia.  Alo- 
phora luctuosa Bigot, Annales Soc. Entomol. France, p. 255; 
1888. Hyalomyia punctigera Townsend, Proc. Ent. Soc. Wash- 
ington, Vol. II, p. 135; April 2, 1891. Hyalomyia aldrichii 
Townsend, |. ¢., p. 156; from a cotype specimen. Hyalomyia 
robertsonit Townsend, l.c. Hyalomyia purpurascens Townsend, 
l.c., p. 157; from a cotype specimen. Hyalomyia celer Town- 
send, Trans. Amer. Ent. Soc., Vol. X XII, p. 65; March, 1895. 
Hyalomyia violascens Townsend, Annals Mag. Nat. Hist., Vol. 
XX, p.32; July, 1897. Phorantha aa and Bergenstamm 
im litt.) ear eee en ere ec ere en Eee eat a occidentis Walk. 
Calypteres brown, first three Coen of abdomen not distinctly 
pollinose except along the sides, the fourth segment lightly 
whitish pollinose and dotted with black, frontal vitta of male 
obliterated on its upper part, wings with a strong whitish tinge; 
length, 3.5 to 4 mm. District of Columbia; Potomac Creek, 
Virginia; Lexington, Ky.; and northern Illinois. Nine males, 
one taken by the writer in July, another captured by Mr. C. W. 
Johnson, May 23, 1896, a third by Dr. W. A. Nason, Augnst 16, 
1895, and six faniicd by Prof. H. Garman. Type No. 3518, 
U8: National Museums 3: Ss fee eee ae calyptrata n. sp. 
Genus ALOPHORA Desv. 
Alophora Desvoidy, Essai sur les Myodaires, p. 295; 1850. 
Hyalomyia Desvoidy, loc. cit., p. 298. 
Schiner! has already referred these two divisions as subgenera of 
the first-mentioned genus, and in this he is followed by Brauer and 
Bergenstamm.? Of the ten species occurring in our fauna, the females 
of only four are known to me: 
1. Wings distinctly marked with brown beyond base of discal cell out- 
— 
side of the:costal cell<( all males) 5 ee = ee ee ee 6, 
Wings wholly hyaline beyond base of discal cell except sometimes 
in the costal-eellic.4 esos. se eee 2. 
2. Second and third abdominal segments shining or subshining..-.. 3. 
Second and following segments opaque, densely yellow gray polli- 
nose; thorax, when viewed from behind, thinly white pollinose 
along the suture, in front of the scutellum, and along the sides; 
eyes contiguous; black, the palpi yellow, calypteres white, wings 
whitish hyaline, costa strongly arcuate, last section of third 
vein slightly less than one-third as long as the preceding section ; 
length, 5 mm. Eastern Washington. A single male specimen 
collected by Professor Piper. Type No. 5519, U. S. National 
Mirseum: 7.2.2 = Ae aS ie se AER AeA Rete et > opaca i. Sp. 
ne eee Vol. I, p. 402; 1862. 
2 Zweit. Kais. Mus. Wien, IV, p. 149; 1889. Also loc. cit., V1, p. 157; 1893. 
