SUBFAMILY CHRYSOMYINAE 131 
Biology, habits, and immature stages. Callitroga americana 
larvae are found in nature only in wounds of man or animals 
and never in decaying meats. It is not saprophagous. Except 
Fig. VII. Callitroga americana female ovipositing on wound on goat. 
Note the shingle-like arrangement of egg clusters. 
in very rare instances, adults of americana have not been cap- 
tured in hand nets and have been obtained in numbers only by 
rearing the species to the adult stage. 
Eggs. Egg masses (Fig. VII) are usually deposited on or near 
edges, or on dry surfaces, of wounds, occasionally on scab or 
