18 INSKCUTOR INSCITI^ MENSTRUUS 



Ochrocera vaginalis, new species. 



Length of body, 11 to 11. o mm. ; of wing, 9.5 mm. Two 

 females, Base Station, Mount Washington, New Hampshire, 

 August 27 and 31, 1914, on flowers of Solidago canadensis 

 (Townsend). 



Black, rather shining. Third antennal joint and tips of 

 palpi ocherous or clear light orange; the first two antennal 

 joints, arista, and rest of palpi rufotestaceous. Frontalia black, 

 cheek grooves brown ; rest of head silvery-white, shading to 

 blackish with incidence of light, leaving a rectangular dark 

 patch on parafacials in direct view and the posterior half of 

 pa^afrontals dark except the inner edge. Thorax and scutel- 

 lum silvery, with three heavy equal uninterrupted black vittae. 

 Abdomen silvery submarmorate, shining, the only tangible 

 marking being a more or less defined median vitta. liegs black. 

 Wings clear. Tegulae white. 



Holotype, No. 19595, U. S. Nat. Mus. Paratype, TD4333. 



Family SARCOPHAGID^ 



Protodexia Townsend. 



Ann. Ent. Soc. Amer. IV, 139, 151 (June, 1911)— As TD354, 



without name. 

 Journ. N. Y. Ent. Soc. XX, 117-118 (June, 1912). 



Genotype, Protodexia synthetica Townsend, 1912, 1. c. 



DiflFers from Ravinia as follows : Female. Front equilateral, 

 hardly over two-sevenths of head- width ; frontalia a little nar- 

 rower than one parafrontal, very slightly narrowing posteriorly 

 to divergence at ocellar area; two proclinate fronto-orbitals, 

 one reclinate behind and in line with them; anterior pair of 

 frontals slightly diverging from line of others. Parafacials 

 very narrow, distinctly narrower than length of second anten- 

 nal joint, with irregular row of fine hairs. Cheek grooves sub- 

 triangular, well impressed, the upper and outer angles sharply 

 pointed and elongate; cheeks much narrower, distinctly less 

 than half eye-height. Face widens abruptly and rapidly from 

 front, distance between lower ends of eyes being more than 

 twice frontal width. Facial depression very rounded, widened 



