no. 3615 HARMSTONIA — ROBINSON 5 



.05-.06 mm; middle tarsus as .17-. 08-. 06-. 04-. 06 mm; hind tarsus 

 as .13-.14-.09-.07-.07 mm. Tips of wing veins 2 and 3 are 1% times 

 as far apart as tips of veins 3 and 4, vein 3 only very slightly curved 

 and not becoming parallel with 4 distally; crossvein as long as or 

 slightly longer than last of vein 5; knob of halter blackish or rarely 

 brownish. Hypopygium (fig. 2) ca. .36 mm long; hypopygial lamella 

 mostly brownish, long and slender, bearing numerous branched setae, 

 with bulging pale inflated area at base, with a small hooked projection 

 on the lower margin. 



Female. — Face bearing two large setae; hind femur without 

 distinct setae along anteroventral surface. 



Type-data. — Holotype cf and allotype 9 from Frederick County, 

 Va. (USNM 66492). 



Distribution. — H. pectinicauda has been collected both in the 

 United States, from northern Virginia, and in Mexico, from San 

 Luis Potosi, Hidalgo, Veracruz, Guerrero, Oaxaca, and Chiapas. 



Notes. — Specimens mounted on microscope slides show a crest of 

 five small setae ventrally on the hind trochanter. The other species 

 I have mounted on slides do not show such setae. 



The Mexican specimens seem like those from Virginia in all details 

 of structure but the tibiae tend to be paler. Three specimens from 

 El Salto in San Luis Potosi show pale brown rather than black knobs 

 on the halters. 



Among the Virginia specimens the males were obtained only in 

 direct sunlight. Females seemed to have no preference. 



Harmstonia simplex, new species 



Figures 3, 16 



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

 brown; antennal segment 3 (fig. 16) shortly acute. Trochanters, 

 distal parts of tibiae, and bases of basitarsi pale, legs otherwise brown; 

 middle and hind femora with a few longer setae along ventral surfaces, 

 middle femur with a 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-. 05-. 06 mm; middle tarsus as 

 .17-.11-.07-.06-.06 mm; hind tarsus as .13-.15-.09-.06-.06 mm. Tips 

 of wing veins 2 and 3 are IK times as far apart as tips of veins 3 and 4, 

 veins 3 and 4 essentially straight and not becoming nearly parallel; 

 crossvein about as long as last of vein 5; knob of halter black or brown. 

 Hypopygium (fig. 3) ca. .25 mm long; hypopygial lamella rather 

 brownish, small and slender, bearing small branched setae, with 

 small pale somewhat bulging area at base, with a small hooked 

 projection on the lower margin. 



