568 SIDNEY I. KORNHAUSER 
Fig. 22 Typical heads, showing male and female characteristics and effect 
of parasites on male head. Nymphal head included for comparison. Above in 
middle, normal male; below, nymph (ny.); left, normal female; right, parasitized 
male (p. o). oc., ocellus; vt., vertex; clp., clypeus; gn., gena; lbr., labrum; 
lbm., labium. X 7.5. 
Fig. 23 Labia, to show increased length in parasitized males. From left to 
right, parasitized male (p. =), normal female, normal male, parasitized male 
(Os Sie 3 ALY. 
