Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
5 1s): 
ig. 120. 
96. 
98. 
ao: 
100. 
101. 
129. 
130. 
131. 
132. 
133. 
134. 
Annals Entomological Society of America  [Vol. XIV, 
Crioprora cyanella; (*315), ventro-cephalic view of genitalia. a, 
cephalic claw from left superior lobe; 6, termination of ejaculatory 
duct; c, right internal lobe; d, chitinous box; e, apical lobe of 
ejaculatory hood; f, caudal lobe of right style; g, cephalic lobe of 
right style. The vestiture of styles and lobe is not shown. 
Milesia virginiensis; ventro-cephalic view of genitalia (*819). a, thinly 
chitinized, apical portion of the superior lobe. 
Somula decora; cephalic view of left style and penis (*306). a, erect, 
caudal lobe of style; c, the baso-lateral prolongation to the tenth 
tergite; b, b, cephalic lobe of style which approaches the one of the 
right style, caudad of the penis; k, sinuate keel at sides of penis- 
sheath to basal prominence above articulation of tergite ten (d). 
PLATE XIX. 
Teuchocnemis litturatus; distal view of genitalia (*238). a@, apical hook 
of styles; b, keel on lateral face of styles; c, cephalic lobe of styles. 
Pterallastes thoracious; ventro-cephalic view of genitalia (*241). a, 
blunt, median thumb of inferior lobe; 6, lateral finger of inferior 
lobe; c, lingula with a small V-shaped notch at apex; just above 
the notch is seen the small aperture of the ejaculatory duct; e, caudo- 
distal hooks of superior lobes; f, cephalo-distal hooks of superior 
tebes; g, swollen basal plate, forming baso-cephalic part of superior 
lobes. 
Teuchocnemis litturatus; left style in lateral view. Captions as in 
Figure 96. 
The same, right style in lateral view. Captions as in Figure 96. 
The same, genitalia in cephalic aspect; d, termination of ejaculatory 
duct. Other captions as in Figure 96. 
Pterallastes thoracicus; genitalia from the right side. d, small thorn at 
base of superior lobes. : 
Microdon tristis; ventro-lateral view of genitalia (*423). a, a, caudal 
part of basal rim of penis; 6, infolded caudal margins of the penis 
sheath, which is not continuous on the caudal surface; c, hairy 
prominence on lateral margin of tenth sternite; d, caudal lobe of 
style; e, cephalic lobe of style. , 
Microdon fuscipennis; ventro-cephalic view of genitalia (*423). f, hairy 
concavity on lateral surface of tenth tergite. Other captions as in 
Figure 129. 
Ceriodes tridens; ventro-cephalic view of genitalia (*317). 
Ceriodes abbreviata; ventro-cephalic view of genitalia (*316). 
Mixogaster breviventris; ventro-cephalic view of genitalia (*159). 
Eupeodes volucris; ventro-lateral view of posabtdomen and genitalia 
(*153). The penis has been separated along the line b from the mesal 
margins of segments VI, VII and VIII; a, disto-ventral projection of 
slender basal part of tenth tergite; b, left side of basal rim of penis; 
c, horny disto-lateral keel of penis-sheath; d, cephalic face of penis- 
sheath; e, caudal face of penis-sheath; f, depression of sternite vi, to 
form a shallow genital pouch. 
