Proceedings of 

 the United States 

 National Museum 



SMITHSONIAN INSTITUTION « WASHINGTON, D.C. 



Volume 123 1967 Number 3615 



Revision of the Genus Harmstonia 

 (Diptera: Dolichopodidae) 



By Harold Robinson 



Associate Curator, Division of Cryptogams 



In a previous paper on the Dolichopodidae (1964), I described the 

 genus Harmstonia and included in it two previously undescribed species 

 occurring in the eastern United States. At that time a number of 

 additional species were already known to occur in Mexico. More 

 recently, specimens of a Costa Rican species have been obtained 

 from the Melander Collection, which is now housed at the U.S. 

 National Museum, and a West Indian species has been collected by 

 various participants in the Bredin-Archbold-Smithsonian Biological 

 Survey of the island of Dominica. In the present paper, descrip- 

 tions and a key are provided for the 13 species now known in the 

 genus. 



Genus Harmstonia Robinson 



Small, 1-2 mm long, dark metallic green with mostly dark bristles. 

 Face of male grayish pollinose, extremely narrow in lower half, sides 

 diverging above and continuous with diverging sides of the front; 

 face of female somewhat wider with a few setae at the lower third; 

 palpus dark with small hairs; pseudotracheae of the labellae rudi- 

 mentary with irregular thickenings; antenna brown or black, all 

 segments short; segment 1 bare above; segment 2 truncate; segment 

 3 blunt or short-pointed, with arista inserted dorsally; lower postocu- 



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