no. 3615 HARMSTONIA — ROBINSON 3 



6. Male hind tibia with a row of indistinct posterodorsals, hind femur with 



sparse slender setae along posteroventral surface (Costa Rica). 



H. costaricensis, new species 



Male hind tibia with a row of very prominent posterodorsals, hind femur 



with many close-set setae along distal half of posteroventral surface 



(Mexico) H. setosa, new species 



7. Knob of halter black or brown, rarely pale brown; hypopygial lamella 



bearing branched setae 8 



Knob of halter yellow; hypopygial lamella without branched setae .... 9 



8. Hypopygium over }{ as long as the body, bearing large lamellae; hind femur 



of the male bearing a fringe of short setae along the anteroventral surface 



(eastern U.S., Mexico) H. pectinicauda Robinson 



Hypopygium about }i as long as the body, bearing very small lamellae; 

 male hind femur without evident fringe anteroventrally (Dominica). 



H. simplex, new species 



9. Legs mostly or wholly brown. 10 



Legs mostly yellow 11 



10. Hypopygium bearing large pale rounded lamellae; all femora of the male 



fringed with long hairs ventrally; face of female with two large setae 



(eastern U.S.) H. intricata Robinson 



Hypopygial lamellae mostly blackish and bearing projections apically; femora 

 of male without distinct setae ventrally; face of female with three to four 

 setae (Mexico) H. obscura, new species 



11. Front with yellowish gray pollen; antennal segment 3 rounded; abdomen 



of male only slightly curved downward, hypopygium usually borne under 

 the tip; face of female with two or rarely three setae (Mexico). 



H. pallida, new species 



Front with brown pollen; antennal segment 3 truncate apically; abdomen 



of male curved distinctly downward with hypopygium borne on tip; face 



of female with four small setae 12 



12. Hypopygial lamella ending in a long attenuate tip (Mexico). 



H. attenuata, new species 

 Hypopygial lamella ending in a short hooklike point (Mexico). 



H. clavicauda, new species 



The genus can be divided into three rather distinct groups. 



Group I (Typical) 



Legs bearing only weak setae, hypopygial lamellae bearing slender 

 apical projections or a bulbous base. The group contains the follow- 

 ing seven species. 



Harmstonia intricata Robinson 



Figures 1, 14 



Harmstonia intricata Robinson, 1964, p. 123 [type-species by original designation]. 



Male. — Length 1.15 mm; wing 1.32 mm by 0.51 mm. Front 

 grayish yellow; antennal segment 3 (fig. 14) short, truncate to slightly 

 rounded below. Basitarsi except tips pale, legs otherwise brown; all 

 femora fringed with long setae below, middle and hind femora with 



