256 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 5 



for group. Male genitalia symmetrical ; uncus simple ; both scaphium and 

 subscaphium present and well developed ; valves strongly sclerotinized 

 except apex of cucullus ; clasper and ampulla absent ; sacculus with basal 

 lobe and distal prong exceeding cucullus ; aedoeagus with one or two large 

 spines on vesica in addition to microtrichiae ; eighth abdominal sternite 

 and tergite greatly reduced ; pair of long invaginated scale-pouches on 

 segment VIII. Female genitalia with sternite VII modified with apical 

 indentation ; sternite VIII absent. 



This genus now contains 6 species and one race from southwestern 

 United States, Mexico, Central America, northern South America, and 

 the West Indies. All of these occur in Mexico and Central America. 

 Only one species {confirmans Wlk.) can be identified with certainty 

 without examination of the genitalia. The other 5 species vary greatly in 

 color and pattern (partly sexual), but an idea of this range of variation 

 can be had from the photographs in the author's 1939 paper. Though few 

 specimens are known of 3 of the species, these specimens show enough 

 intraspecific pattern differences to suggest that the wide variation known 

 for deducta and similaris will be repeated in mexicana, schausi, and more- 

 losa. 



All specimens listed herein have been identified from genitalic slides 

 except the unavailable types of albina Stkr. and part of the confirmans 

 series. 



All the Mexican and Central American females had mated, as shown 

 by the presence of a spermatophore in the bursa copulatrix. Fig. 6 of 

 pi. 33 is drawn deliberately from a virgin female, and over it has been 

 superimposed the bursa of a mated specimen (dotted line). As this shows, 

 virgin females have a smaller, definitely wrinkled bursa copulatrix which 

 after mating is fully distended, smooth, and considerably larger. 



KEY TO MALES 



A. Aedoeagus with only one large spine on vesica .... schausi 



AA. Aedoeagus with two large spines on vesica 



B. Juxta with scobinate prongs deducta 



BB. Juxta with rounded or squarish margin, without any special 

 processes 



C. Aedoeagus with spiculations on dorsal side near tip (in addi- 

 tion to those on vesica) 



