70 PROCEEDINGS OF THE ACADEMY OF [Part I 



stripe less conspicuous; white rings on legs rather narrower, the 

 seven black and white rings on hind tibiae all equal in length. Mr. 

 Edwards thinks that the two forms are probably specifically the 

 same, an opinion in which the writer concurs. 



Erioptera (Erioptera) apicialba sp. n. 



Sex?— Wing 2.8 mm. 



The type is badly eaten by ants. The species is related to E- 

 annulipes Williston, differing as follows: General coloration much 

 darker. Mesonotal praescutum dark gray with a broad brownish 

 median stripe that is narrowly divided by a pale line, the tuber- 

 culate pits lying one on either margin of this pale line; a small ob- 

 scure yellow area before the pseudosutural foveae; margin of the 

 praescutum narrowly whitish. Pleura dark brown; a narrow, but 

 conspicuous, ventral silvery white longitudinal stripe extending 

 from behind the fore coxae to the base of the abdomen; above the 

 hind coxae a much abbreviated similar stripe lying parallel with the 

 first; sternum heavily gray pruinose; dorso-pleural membranes sul- 

 phur yellow. Legs with the trochanters brown; tibiae with three 

 black bands, on the middle legs these being much broader than the 

 pale interspaces, on the posterior legs as wide as or narrower than 

 the interspaces. Wings with a uniform gray tinge; an indistinct 

 whitish suffusion across the disk in the region of the cord ; the costal 

 margin, including cells C and Sc, white, interrupted by three small 

 dark brown spots, one each at the tips of Sci, Ri and R2, these dark 

 areas being smaller than the interspaces; the entire wing-apex is 

 broadly white excepting a narrow seam along vein 7?4+5 which 

 continues almost to the margin; rounded white spots in the ends of 

 cells 2nd R^, Ms, Cui and Cu; veins dark brown, paler in the hya- 

 line areas, the veins that traverse the wing-apex being snowy-white, 

 including their macrotrichiae; narrow brown seams at S>C2 and along 

 the cord. Venation: cell 1st Mn open by the atrophy of m as in this 

 group of species; vein 2nd A gently arcuated near its tip. 



Habitat . — Brazil. 



Holotype, Sex?, Teffe, December 29, 1919 (H. S. Parish). 



Erioptera (Mesocyphonat parva brasiliensis Alexander. 



1913. Erioptera parva brasiliensis Alexander, Proc. U. S. Nat. Mus.,vol. 44, 

 p. 514. 



The types were from Igarape Assu, Brazil, January 19-Febru- 

 ary 7, 1912 (H. S. Parish). Other material is available as follows: 

 Prata, June 30, 1919 (H. S. Parish). 

 Manaos, Brazil, November 1, 1919 (H. S. Parish). 

 Teffe, Brazil, January 16, 1920 (H. S. Parish). 

 Iquitos, Peru, March 20, 1920 (H. S. Parish). 

 Yurimaguas, Peru, March 25-April 15, 1920 (H. S. Parish). 

 Napo River, Peru, June 15, 1920 (H. S. Parish). 



