2 PEOCEEDINGS OF THE NATIONAL MUSEUM vol. 75 



the anterior branch of the posterior fork of Rs, R4, has been captured 

 by the stem of the anterior fork, R2+3, to form a short to longer fusion, 

 i?2+3+4- Because the first branch of the sector, R2, has not fused 

 backward with Ri, the venation of the Phlebotominae appears 

 pectinate. 



The Bruchomyinae may be separated from the remaining Psy- 

 chodidae by the following key: 



1. Radial sector, Rs, with four branches 2. 



Radial sector, 72s, with three branches TRICHOMYINAE. 



2. Distal section of vein Cui elongate, extending generally parallel to vein M4, 



cell Mi at wing margin being approximately equal in width to cell M3; 

 cell C« sometimes very wide at margin, exceeding cell Mi] Sc reduced, <Sci 



and usually Sc2 atrophied PSYCHODINAE. 



Distal section of vein Cui short to very reduced, bent toward the axilla, longer 

 and more nearly straight in Bruchomyia; cell Mi at wing margin as wide 

 as or wider than cell Cu, usually very wide; Sc long, Sc2 and usually Sci 

 preserved __ 3. 



3. Rs pectinately 4-branched, R4 being captured by the upper fork of the sector; 



mouth parts of female elongate, formed for blood sucking. 



PHLEBOTOMINAE. 

 Rs dichotomously 4-branched, 722+3 and 724+5 being present; mouth parts nor- 

 mal, not formed for blood sucking BRUCHOMYINAE. 



The Trichomyinae (Tonnoir, 1922) will presumably include Sycorax 

 Haliday. The validity of this group as a separate subfamily is con- 

 firmed by the recent discovery of the larva of Sycorax^ erroneously 

 considered by its discoverer as being a new genus of Dixidae. Edwards ^ 

 has indicated the probability that Sycorax should represent a sub- 

 family of Psychodidae. 



The two genera of Bruchomyinae may be separated as follows: 



1. Antennae with 27-30 segments, including the reduced apical button; distal 

 section of vein Cui long, approximately as long as the basal section. 



Bruchomyia Alexander. 

 Antennae with 17 segments, including the reduced apical button; distal 

 section of vein Cui short, curved strongly to the anal margin. 



Nemopalpus Macquart. 



Genus BRUCHOMYIA Alexander 



1920. Bruchomyia Alexander, Ann. Ent. Soc. America, vol. 13, p. 403. 

 1927. Bruchomyia Alexander, Genera Insectorum, fasc. 189, p. 4. 



The genotype and hitherto onl}^ known species of Bruchomyia is 

 B. argentina Alexander (1920), known only from various parts of 

 Argentina. The species recently described as Bruchomyia pallipes 

 Shannon and del Ponte (1927) is herewith transferred to the genus 

 Nemopalpus. Two additional species of Bruchomyia, recently dis- 

 covered in Peru by Raymond C Shannon and kindly loaned to me 

 for study, are described in the present report. 



iQ. W. MuUer, Zeitschr. Morph. Oekol. Tiore, vol. 7, pp. 535-642, 1927. 

 'Entomologist, vol. 61, pp. 207-208, 1928. 



