'C)0 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 51 



very narrowly, being the base of the hypopygium. It is in reality 

 the sixth segment, since there is a very abbreviated basal segment 

 present. What appears to be the fifth segment is only the portion 

 of the fourth behind the transverse row of submarginal macro- 

 chaetae. The scutellum shows practically no yellowish on apex. 

 The third segment (called second heretofore) has, in addition to the 

 six approximated macrochaetae on hind border in middle, three or 

 four (usually four) approximated lateral ones on each side. The 

 second segment (so-called first) has one lateral macrochaeta on each 

 side. The apical decussate pair of scutellar macrochaetae is quite as 

 strong and long as any of the others of scutellum. The narrow 

 linear yellow of hind margin of third segment is continued in a 

 slight anterior prolongation on the median line in the two Sierra 

 Madre specimens. In addition to the two large silvery spots of 

 third segment of venter, there are two smaller ones on the second 

 and fourth ventral segments in the above specimens. 



Genus Myxodexia Brauer and von Bergenstamm 



Syn. Tfopidomyia Brauer & vox Bergenstamm (preocc). 



Neotropidomyia Townsend, nom. nov. (Dec, 1891), Trans. Am. Ent. 

 • Soc, xviii, p. 382. 



The type of this genus is M. macr onychia Brauer and von Ber- 

 genstamm, of Syria. 



Subfamily Trixin/e 



EUCLYTIA, gen. nov. 



This genus is herewith proposed for the species Clytia flava 

 Townsend (Tr. Am. Ent. Soc, xvin, pp. 372-373). It may be 

 known by the two rows of weak frontal bristles on each side of 

 frontalia. the outer row weaker and somewhat irregular. The epis- 

 toma is but slightly prominent. Specimens in U. S. N. M. have 

 been referred by Brauer and von Bergenstamm to Redtenbacheria, 

 but the species certainly can not be included in that genus. 



It is distinct from the old genus Clytia, now to be known as 

 Clytiomyia, of which the European C. helvola is to be taken as the 

 type. Clistomorpha also is a very different genus. Both Clisto- 

 morpha and Clytiomyia belong in the Phasiidae. 



Tribe P h asiopteryg i n i 



Genus Phasiopteryx Brauer and von Bergenstamm 



Phasiopteryx bilimeki Brauer and von Bergenstamm. — The re- 

 marks on this species in Ann. and Mag. Nat. Hist., xix. pp. 33-34, 



