1983] 
Burnham — Geraridae 
29 
a 
Fig. 14. Gerarus fischeri, a. drawing of fore wing, based on specimens IP 4, 5, 7, 
and 23. b. drawing of hind wing based on specimens IP 5, 7, and 10. 
separately from CUA at wing base; anterior branch of CUP fusing 
with CUA for approximately 9 mm before weakly breaking away; 
multiple veins and well-developed reticulation present in anal area. 
Hind wing; length 39-47 mm, width 13-14 mm; SC and R same as 
in fore wing; RS parallel to R and pectinate, with number of 
branches varying from four to five; spacing of these branches rela- 
tive to one another also variable (in one specimen IP 2 the first 
branch of RS is connected to the main stem of RS by a strengthened 
cross vein, forming a small oval in the middle of the wing); M deeply 
cleft with one or two branches; CUA and CUP parallel. The anal 
area of hind wing not known for this species, but appears to be 
slightly expanded, judging by overall wing shape. See fig. 17. 
