no. 3615 HARMSTONIA — ROBINSON 7 



tips of basitarsi brownish, legs otherwise yellow; middle femur with 

 a weak preapical; 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 .15-.06-.05-.05-.06 mm; middle tarsus as .19-.10-.08-.06-.07 mm; 

 hind tarsus as .15-.17-.11-.08-.07 mm. Tips of wing veins 2 and 3 

 twice as far apart as tips of veins 3 and 4, vein 3 rather distinctly 

 bending and becoming parallel with vein 4 distally; crossvein about 

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

 ca. .21 mm long; hypopygial lamella pale, with a narrow pointed tip 

 and slightly inflated base. 



Female. — Face bearing two or three small setae. 



Type-data. — Holotype d* and allotype 9 from Mexico: San Luis 

 Potosi, El Salto, on limestone deposits in river below upper falls, May 

 9, 1963, H. Robinson (USNM 69432). Paratypes: same data as 

 holotype, 18 d" and 18 9. 



Notes. — H. pallida, in spite of superficial resemblance to H. 

 attenuata and H. clavicauda, seems more closely related to H. pectini- 

 cauda and H. simplex. The rounded third antennal segment of 

 H. pallida seems rather distinctive. The antenna of H. obscura 

 seems similar, but that species is very different in other characters 

 including the structure of the hypopygial lamella. 



Harmstonia attenuata, new species 



Figure 6 



Male. — Length 1.06 mm; wing 1.17 mm by 0.42 mm. Front 

 brown; antennal segment 3 not visible. Tarsi from tips of basitarsi 

 brownish, legs otherwise yellow; middle femur wdth 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-.06-.05- 

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

 as .13-.17-.11-.08-.07 mm. Tips of wing veins 2 and 3 are 1% to 2 

 times as far apart as tips of veins 3 and 4, vein 3 bending slightly 

 and becoming nearly parallel with vein 4 distally; crossvein slightly 

 shorter than last of vein 5 ; knob of halter yehW. Abdomen curving 

 distinctly downward; hypopygium (fig. 6) mounted directly on apex 

 of abdomen, ca. .25 mm long; hypopygial lamella with a very long 

 and narrow tip, bearing a few slender projections on distal part of 

 lower edge, with a large densely pubescent lobe near base, without 

 inflated area at base. 



Female. — Face bearing four small setae; antennal segment 3 short 

 and truncate apically. 



