AMERICAN DIPTERA. 245 



slightly mixed with whitish on the sides of each segment; on the hypo- 

 pygium with longer light yellowish or whitish pile. Legs deep black, 

 the front and middle knees very narrowly yellowish, the pulvilli and 

 base of claws light yellow; on the front tibiae below, their tarsi, and 

 on the middle tarsi, less so, with reddish pubescence. Wings blackish 

 on the anterior portion toward the base, along the posterior and outer 

 part more dilute, but still slightly tinged with brown or blackish; 

 first posterior cell not at all narrowed at the margin, forth posterior 

 cell broadly open, the fifth vein at the tip slightly curved backward. 

 One specimen. 



Type. — Bigot collection. 



Habitat. — California (type) ; Kern County (S. W. Williston). 



This description is that of Dr. Williston. He is in doubt as 

 to its specific identity, but I believe that he is correct. Bigot 

 very briefly diagnosed his type as follows: "Long, 15 mm. 

 Totus niger, abdomine nitido; halteribus et pulvillis flavis; 

 alis nigris, intus et apice parum dilutioribus, Oculis nudis. — 

 California." 



Myelaphus rufns. 



Myelaphus rufus Williston, Trans. Am. Ent. Soc. XI, 7, 1884, 

 XIII, 288, notes, 1886. 



" $ $. — Length 17 mm. — -Yellowish-red; the third segment of the 

 antennae and the style, proboscis, occiput, three broad abbreviated 

 stripes on the dorsum of thorax, two spots on the lower part of the 

 pleurae and tips of claws black. 



Face, front and first two segments of the antennas reddish-yellow, 

 polished; the face below, near the eyes and on each side of the base 

 of the antennae lightly yellowish dusted. Bristles of the oral margin 

 yellowish- white; on the sides of the front a few shorter yellow ones. 

 Third segment of antennae and the style deep black; the first segment 

 in one male is black. Proboscis black, the palpi yellowish. Occiput 

 black, thickly yellowish pruinose on the sides; occipito-orbital bristles 

 short, thin, and, like the sparse short beard below, are yellow. Dor- 

 sum of thorax yellowish-red, with three broad black stripes separated 

 from each other by linear intervals; the lateral ones begin some 

 distance behind the humeri and extend to within a short distance of 

 the scutellum, on the posterior part narrow; the middle one begins at 

 the pro thorax and has well-defined edges to the transverse suture, 

 immediately behind the suture the stripes become obsolete. The 

 dorsum is clothed with short, not very abundant golden pile, and has 

 three or four short, inconspicuous yellow intra-alar bristles. Pleurae 

 yellowish-red except a large spot above the middle coxae and another 

 nearly confluent smaller one above the hind coxae, which are smooth, 



TRANS. AM. ENT. SOC., XXXV. JULY, 1909. 



