1921] NATURAL SCIENCES OF PHILADELPHIA. 73 



tennae of the male elonsjate, bicolorous, the base and apex of each 

 flagellar segment pale, the middle portion of each segment provided 

 with long, conspicuous, outspreading hairs, very much as in males 

 of the genus Polymera. The oar-like brushes on the posterior legs 

 with conspicuous violaceous reflexions. Male hypopygium with the 

 lyriform plate small, the two arms powerful, divergent, the tips 

 incurved, a little more than the apical third of each arm is pro- 

 vided on the inner face with conspicuous erect spines, those toward 

 the tip more appressed; among these spines, at about two-thirds 

 the length of the arm is an extensive cushion of short, erect, bristle- 

 like spines. In M. thaumastopodus, the arms of the lyriform plate 

 are slender, directed caudad and laterad, with only the tips directed 

 a little proximad ; these arms are" entirely smooth with the exception 

 of four or five appressed spines at the very tip on the inner face; 

 there is no evidence of a cushion of shorter bristles. 



Habitat. — Brazil, Peru. 



Holotype, d" , Santa Felipe, Brazil, June 26, 1920 (H. S. Parish). 



Allotype, 9 , Iquitos, Peru, May 25, 1920 (H. S. Parish). 



Molophilus (Eumolophilus) thaumastopodus Alexander. 



1913. Molophilus thaumastopodus Alexander, Proc. U. S. Nat. Mus., 

 vol. 44, pp. 510, 511. 



The types were from Para and Igarape Assii, Brazil. Other ma- 

 terial is from Flores, Brazil, November 10, 1919; Manaos, Brazil, 

 November 1, 1919 (H. S. Parish); and Teffe, Brazil (H. S. Parish). 



Genus CRYPTOLABTS Osten Sacken. 

 1859. Crypiolabis Osten Sacken, Proc. Acad. Nat. Sci. Phila., p. 224. 

 Cryptolabis (Cryptolabis) tenuicincta sp. n. 



General coloration whitish testaceous, thoracic pleura with a 

 conspicuous brown longitudinal stripe; wings subhyaline with a 

 brown spot at the arculus and a narrow brown crossband at the 

 cord; cell M3 very deep, extending basad almost to the fork of M, 

 an apparent m-cu crossvein being formed. 



Sexf—Wing, 4.2 mm. 



Head lacking in the unique type. Mesonotum pale whitish testa" 

 ceous, unmarked with darker. Pleura concolorous with the dor" 

 sum, the dorsal sclerites with a broad, dark brown, longitudinal 

 stripe extending from the cervical sclerites to beneath the roo*^ 

 of the halteres. Halteres pale, the knobs broken. Legs with the 

 coxae and trochanters whitish testaceous; femora and tibiae pale; 

 tarsi broken; femora and tibiae with conspicuous, erect, pale hairs. 

 Wings subhyaline; a brownish spot at the arculus; a narrow and 

 indistinct brownish seam along the cord, beginning as a faint double 

 marking on Rs and R2+3, continued caudad across the wing to the 

 posterior margin; veins pale, darker in the infuscated areas. Sparse 

 macrotrichiae in the distal ends of cells Slid Ri, R2, Ri, Ri,, M2, M3 



