4 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 123 



weak preapicals; fore- and hind tibiae without prominent dorsals or 

 apicals, middle tibia with a weak anterodorsal and a weak postero- 

 dorsal near basal third; lengths of segments of foretarsus from base 

 as .16- 09-.06-. 05-.06 mm; middle tarsus as .21-.09-.07-.05-.05 mm; 

 hind tarsus as .16-.14-.09-.06-.06 mm. Tips of wing veins 2 and 

 3 are \)i times as far apart as tips of veins 3 and 4, vein 3 very slightly 

 curved to become nearly parallel with 4 dis tally; cross vein as long 

 as last of vein 5; knob of halter pale yellow. Hypopygium (fig. 1) 

 ca. .35 mm long; hypopygial lamella broad and rounded apically, 

 with bulging pale inflated area at base, with a slender inward pro- 

 jection from middle of lower margin. 



Female. — Face bearing two large setae; femora without long setae 

 below. 



Type-data.— Holotype 6* and allotype 9 from Knox County, Tenn. 

 (USNM 69429). 



Distribution. — H. intricata is known only from the eastern U.S., 

 having been collected in eastern Tennessee, northern Virginia, Mary- 

 land, and central New York. 



Notes. — The hypopygial lamellae of H. intricata are unique for 

 Group I in having a broad rounded apical portion and lacking any 

 slender apical projections. The pale bulbous region of the lamella 

 base, however, clearly relates H. intricata to other species in the 

 group. Such a hyaline or bulbous area is present to some extent in 

 most species of the group and is particularly well developed in H. 

 pectinicauda. In all cases the surface of this hyaline or bulbous area 

 bears some scattered setae. 



While collecting specimens from a muddy rut at the type-locality 

 in Tennessee, I noticed that the males were collected from the drier 

 parts of the rut, but females were apparently restricted to the part 

 containing some standing water. 



Harmstonia pectinicauda Robinson 



Figures 2, 15 

 Harmstonia pectinicauda Robinson, 1964, p. 123. 



Male. — Length 1.00 mm; wing 1.17 mm by 0.42 mm. Front 

 brownish or grayish; antennal segment 3 (fig. 15) short, nearly 

 truncate, lower part projecting forward somewhat beyond end of 

 dorsal edge. Basitarsi except tips and tibiae pale, legs otherwise 

 brown ; hind femur with distinct row of short setae along antero ventral 

 surface, middle and sometimes hind femur with weak preapical; 

 fore- and hind tibiae without prominent dorsals or apicals, middle 

 tibia with a weak anterodorsal and a weak posterodorsal near basal 

 third; lengths of segments of foretarsus from base as .13-.07-.06- 



