4 PROCEEDINGS OF THE NATIONAL MUSEUM vol. ism 



to-greatest-breadth ratio of the third segment. The P/H ratio is the 

 value obtained by dividing the distance from the interocular seta base 

 to the torma by the distance from the torma to the top of the labrum- 

 epipharynx. Wing length is measured from the basal arculus to the 

 wing tip; costal ratio is the value obtained by dividing the distance 

 from the basal arculus to the end of the costa by the wing length. 

 Measurements are of single specimens unless values are presented as 

 mean value (minimum-maximum, n=number of measurements). 



The types of our new species are deposited in the U.S. National 

 Museum in Washington, D.C.; when available, paratypes will be de- 

 posited in the British Museum (Natural History) in London, in the 

 Department of Preventive Medicine and Public Health of the Uni- 

 versidad el Valle in Cali, Colombia, in the Department of Parasi- 

 tology and Tropical Medicine of the Universidad de Los Andes in 

 Bogota, Colombia, and in the Department of Hygiene and Public 

 Health of the Universidade de Sao Paulo, Brazil. 



Subgenus Avaritia Fox 



Species of the subgenus Avaritia are characterized by a broad wing 

 with short, broad radial cells, the tip of the second radial cell being at 

 least slightly included in the poststigmatic pale spot; wing markings 

 variable, often diffuse at least distally, cell M4 without pale area 

 bordering veins M3+4 and Cul; wing macrotrichia sparse or absent; 

 third palpal segment usually slender, nearly always with a small, 

 round distal sensory pit, the portion beyond the pit not narrowed; 

 thorax unicolorous dark brown, scutum frequently with a pair of 

 sublateral blackish areas or vittae; eyes contiguous, with or without 

 interf acetal hairs ; antennae usually with segments not greatly tapered 

 distally, usually with sensorial pattern of in, ix-xv. Two spermathecae 

 present plus a rudimentary third and a small sclerotized ring on the 

 duct. Male genitalia variable; parameres separate, the bases not 

 knobbed but with stout laterally directed process; aedeagus often 

 with heavier sclerotization across the basal arch and with internal 

 median sclerotized peg distally. 



Andicola Group 



This new group differs from the two previously known groups of 

 American Avaritia as follows: from the Neotropical Pusillus Group 

 the species differ in their much larger size, dark legs, broad radial 

 cells, and longer costa, and in their geographical restriction to the 

 temperate higher altitudes; from the Holarctic Obsoletus Group they 

 differ in their hairy eyes, stronger radial venation, and darker wing 

 infuscation. 



