Dec, I9IS-] Townsend: New Muscoidea. 233 



Thorax silvery; with five blackish vittae, the three middle ones so approxi- 

 mated as to be almost confluent, the middle one and the two outer ones reach- 

 ing further back than the other two. Scutellum fulvotestaceous apically, all 

 silvery. Abdomen silvery, the second and third segments with large subrec- 

 tangular blackish markings that wax and wane according to light incidence ; 

 first segment black. Legs blackish. Wings clear. Tegulse white. 

 Holotype, No. 19576 U. S. N. M. 



Family RHODOGYNID^. 

 ODONTOCYPTERA new genus. 



Genotype, Odontocyptcra nana Townsend new species. 



Differs from Neocyptera as follows : Female. — A spinigerous tu- 

 bercle present on venter of second abdominal segment, formed by 

 inner ends of tergal sclerites. First abdominal segment no longer 

 than second. Basal segment of hypopygium more elongated. Ab- 

 domen of equal width behind basal constriction. There is a delicate 

 straw-colored chitinous piercer. The spines of tubercle are directed 

 posteriorly and function in holding host during act of oviposition. 



This genus might easily be confused with Bcsscria, but is very 

 distinct, as shown by venation and other characters. 



Odontocyptcra nana new species. 



Length of body, 5.5 mm.; of wing, 4.5 mm. One female. Head of Rio 

 Piedras Verdes, about 7,300 feet, Sierra Madre of Chihuahua, Mexico, July 14, 

 1899 (Townsend). 



Differs from Neocyptera dosiades Walker in coloring only as follows : 

 First abdominal segment red except broad median trvincate triangle above, sides 

 of base and median vitta on venter; leaving sides broadly red behind. Second 

 segment all red except broad median vitta above in continuation of the trunca- 

 tion of triangle, and the spinigerous tubercle of venter. Third segment red 

 except only reversed irregular triangle above which is continuous with black 

 of anal segment and hypopygium. 



Holotype, No. 19577 U. S. N. M. 



CYCLODION-^A new genus. 



Genotype, Cyclodioucca acuminata Townsend new species. 



Differs from the other genera of the Leucostoma group by the 

 following characters : Third and fourth abdominal segments of fe- 

 male successively much narrowed, constricting rapidly but evenly from 

 the narrowing second segment ; segments one and two very long, three 



