NO. 2018. SYNOPSIS OF GENERA OF AGROMYZIDM— M ALLOC H. 147 



2. Legs except fore coxae, knee joints and bases of tarsi black; outer cross vein of 



wing at less than its own length from end of fifth vein coronata Loew. 



Legs yellow, femora black gray, all tibiae brownish on middle, tarsi with apical 

 joint blackened; outer cross vein at three times its own length from end of 



fifth vein parvula Loew. 



TETHINA ROSTRATA Hendel. 

 Tethina rostrata Hendel, Wien. Ent. Zeitg., vol. 30, 1911, p. 41. 



This species was described by Hendel from specimens sent him by 

 Professor Aldrich from Pender, Idaho, and Friday Harbor, Washing- 

 ton. I have not seen the species, which is unrepresented in the U. S. 

 National Museum collection. 



TETHINA CORONATA Loew. 

 Rhicnoessa coronata Loew, Dipt. Amer. Sept. Ind. Cent., 6, 1865, species 98. 

 This species was described from Georgia by Loew. I have seen 

 specimens from Logansport, Louisiana (E. S. Tucker) ; Longview, 

 Texas (E. S. Tucker); and Durango, Mexico (F. C. Bishopp). This 

 species is very close to T. cinerella Haliday, differing in color of the 

 fore coxas and in venation, that of the European species being nearer 

 to the venation of parvula. 



TETHINA PARVULA Loew. 



Rhicnasssa parvula Loew, Dipt. Amer. Sept. Ind. Cent., 8, 1869, species 81. 



Originally described from Newport, Rhode Island. I have seen 

 three specimens from Galveston, Texas (W. D. Pierce). Taken on 

 Tamarix gallica. 



Genus RHICNCESSA Loe-w. 



RhicnoRssa Loew, Wien. Ent. Monatsch., vol. 6, 1862, p. 175. 

 This genus though bearing a superficial resemblance to Tethina 

 reaUy belongs to the Milichinae. The only described species occurring 

 in North America which is referable to this genus is I consider alhula 

 Loew. I have seen several specimens of this from Galveston, Texas 

 (E. S. Tucker). There is another species which occurs in Texas the 

 description of which is given herewith. Anihomyza cinerea Williston, 

 which Hendel suggests is a species of Rhicncessa, may belong here, 

 but the name is preoccupied by cinerea Loew (1862), so that, even 

 should it be distinct from alhula Loew, or identical with the one now 

 described, the name can not stand. Hendel states in his paper ^ 

 "XantJiopoda Williston wahrscheinlich zu Tethina.'' I have not 

 seen either of Williston's species, which were described from St. Vin- 

 cent, West Indies. 



RHICNCESSA ALBULA Loew. 



Plate 6, fig. 22. 



Rhicnoessa alhula Loew, Dipt. Amer. Sept. Ind. Cent., 8, 1869, species 80. 



This species was originally recorded from Newport, Rhode Island. 



The series I have examined was taken at Galveston, Texas, March 



17, 1908 (E . S. Tucker). 



I Wien. Ent. Zeitg. vol. 30, 1911, p. 42. 



