-7- 



Leucotrichia Mosely 1934 



1. 3 ocelli 

 - 2 ocelli 



fig. 8a 



limpia Ross 1944 

 -2 



2. Head without special 

 lobes; antennae simple 



- Head with setate lobes. 

 Some antennal segments 

 flattened. 7th sternite 

 with brush of setae 



Mayatrichia Mosely 1934 



1. Aedeagus tip blunt 



- Aedeagus tip pointed 



2. Aedeagus tip 3 pronged 



- Aedeagus tip not pronged 



3. Mesal lobe of claspers 

 nearly truncate; apical 

 setae long stout 



- Mesal lobe of claspers 

 oblique; apical setae 

 short slender, not arising 

 in same plane 



Metrichia Ross 1938 



fig. 9a 



fig. 10a 



fig. 11a 

 fig. 14a, 14c 



fig. 12a 



fig. 13a 



sarita Ross 1944 



pictipes (Banks) 1911 



-2 

 -3 



ayama Mosely 1934 

 moselyi B. & D. 1977 



ponta Ross 1944 



acuna Ross 1944 



1. Lateral aspect: clasper 2 x 



as long as wide; cerci fig* 16a 



elongate 

 - Lateral aspect: clasper 4.5 



X as long as wide; cerci 



ovate 



arizonensis Flint 

 1972 



-2 



2. Tips of both aedeagal rods 



pointed fig* 15a 



- Tip of one rod truncate fig* 17a, 17b 



Orthotrichia Eaton 1873 



nigritta (Banks) 1907 

 volada B- & D. 1977 



1. Subgenital plate with long 

 slender lateral arms 



- Lateral arms subgenital 

 plate short, rounded; no 

 internal process 



fig. 18c 



aegerf asciella 

 (Chambers) 1873 



-2 



