308 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.43. 



vein which is a little approximated to it; fourth vein usually con- 

 tinued in extremely short stump. Costal spine very small and 

 inconspicuous. 



Reproductive habit, larviposition of uncolored maggots on or near 

 host. 



Type-species. — Opliirodexia pulchra Townsend. 



OPHIRODEXIA PULCHRA Townsend. 



Ophirodexia pulchra Townsend, Ann. Ent. Soc. Amer., vol. 4, 1911, pp. 134 and 

 147.— TD 3999. 



Length of body, 6 to 7 mm.; of wing, 4.5 to 5.5 mm. Three males 

 and two females, Piura, Peru, November 12, 1910, to March 7, 1911, 

 on bark of mesquite limbs. 



Face, front, and cheeks silvery-white pollinose in both sexes, the 

 cheek-grooves showing yellowish-brown in some lights. Facial plate of 

 a duller shade . Antennae and p alpi brownish-yellow, the plumose hairs 

 of arista blackish. Frontaha dark brown or blackish. Occiput and 

 vertex ashy. Thorax silvery, with a cinereous shade dorsally. 

 Scutellum and lateral posterior edge of mesoscutum, with median 

 spot just behind suture, brown; the posterior two-thirds of third 

 abdominal segment is brown, the tip of anal segment also, and less 

 distinctly a broad median triangle on second segment and a median 

 patch on first brownish. Rest of abdomen pale brownish-yellow, 

 thickly silvery pollinose, the pollen with a tawny shade and showing 

 in broad basal bands on second to fourth segments. Femora and 

 tibias brownish-yellow, lightly pollinose; tarsi blackish. Wings infus- 

 cated on costal one-third, the infuscation also narrowly following the 

 long veins and cross veins. Tegulse white. 



Type.—Cat. No. 15146, U.S.N.M. Female, November 13, 1910; 

 TD3999,/. r. s. 



DIAPHOROPEZA PERUANA Townsend. 



Dmphoropeza peruana Townsend, Ann. Ent. Soc. Amer., vol. 4, 1911, p. 147. — 

 TD 4026. 



Length of body, 6.5 to 7.5 mm.; of wing, 5 to 6 mm. Numerous 

 females, Sullana, Peru, October 1, 1910, to April 11, 1911, on bark of 

 trunk and large branches of tamarind tree in Rio Chira Valley. 



Head silvery-cinereous. Frontalia brownish; antennae reddish- 

 yellow, third joint except base dusky, arista blackish. Palpi pale 

 yellowish. Whole body black in ground color, pleurss silvery, me- 

 soscutum with three wide silvery vittae, the middle one continued over 

 scutellum, which it wholly suffuses in some lights. Intermediate 

 abdominal segments silvery-white anteriorly, more broadly so on 

 sides; sides of first segment and all of anal segment except tip sil- 

 very. Legs black. Wings faintly infuscated on costal region and 



