REPORT OF THE STATE ENTOMOLOGIST I915 I45 



by Messrs Dyar and Caudell on Cactus in Colorado, flies appear- 

 ing June 2d. Specimens reared from Opuntia at Los Angeles, Cal., 

 April 11, 1908, at Beeville, Texas, March 7, 1908, at Ash Fork, 

 Ariz., June 5, 1906 and in the Organ mountains May 17, 1905, were 

 received from Mr W. D. Hunter of the bureau of entomology. Evi- 

 dently this species has a wide distribution in the southwestern states. 

 Larva. Length 6 mm, rather stout, presumably yellowish white; 

 breastbone bidentate, the teeth heavy, broad, triangular, the heavy, 

 chitinized portion tapering from the base of the teeth to the anterior 

 third, thence a rather stout, uniform process extending to the pos- 

 terior extremity which is expanded as a weakly chitinized lunate 

 piece. The anterior half of the breastbone is supported by a weakly 

 chitinized irregularly oval area and by a similar weakly chitinized 

 irregularly trapezoidal area on the anterior segment; skin slightly 

 shagreened, the anal segment slender, bilobed. 



Exuviae. Length 6 mm, cephalic horns long, stout, conical, the 

 third or fourth abdominal segment with a very uniform row of 

 heavy, stout spines on the distal third, the basal half with three 

 irregular rows of stout spines; terminal segment with a posterior 

 row of eight spines, the four median ones smaller, the others larger, 

 the basal half with smaller, scattering spines. 



Male. Length 4 mm. Antennae nearly as long as the body, 

 sparsely fine haired, dark brown; 14 segments, the third with a length 

 fully six times its diameter ; terminal segment slightly prolonged and 

 bearing a small apical knob. Palpi very small, indistinct; face 

 yellowish white. Mesonotum a slaty brown, the sublateral areas 

 distinctly lighter, submedian lines rather indistinct, sparsely clothed 

 with fine hairs. Scutellum a slaty brown with a few yellowish setae 

 apically, postscutellum fuscous yellowish. Abdomen dark brown, 

 sparsely clothed with fine, silvery hairs, the incisures pale yellowish. 

 Wings hyaline, costa dark brown; halteres yellowish basally and 

 apically, brown subapically. Pleurae and coxae basally dark brown. 

 Legs a variable light brown, tarsi slightly darker; claws stout, strongly 

 curved, the pulvilli a little longer. Genitalia; dorsal plate short, 

 broad, the lobes divided, irregularly subquadrate. 



Female. Length 6 mm. Palpi; the first segment short, roundly 

 subquadrate, the second stout, subrect angular, with a length over 

 twice its diameter, the third longer, slender, irregularly fusiform; face 

 yellowish. Mesonotum very dark brown, submedian lines indistinct, 

 sparsely clothed with fine setae. Scutellum reddish brown, post- 

 scutellum a light fuscous yellowish with a dark brown, submedian 

 area. Abdomen dark brown, very sparsely clothed with fine setae, 

 the ovipositor dark reddish brown; halteres fuscous yellowish bas- 

 ally, light yellowish apically; the distal tarsal segments narrowly 

 and rather indistinctly annulate with dark brown. Ovipositor 

 longer than the body, otherwise nearly as in the male. Type Cecid. 

 848. 



