122 



American Midland Naturalist Monograph No. 1 



tively. The very early stage nymphs have the elongated tubercles lying hori- 

 zontally or at an angle at the margins and with one or more hairs projecting 

 from their tops, thus resembling the tubercles or "protuberances" found on 

 adult mar ginatus . 



LARVA 



Small, oval. Length (including mouth parts) 0.44, width 0.25. Legs short 

 and with large, bulbous pulvilli; claws absent; leg 1 the longest and only about 

 twice as long as the mouth parts. Capitulum terminal, with basis capituli short, 

 scarcely visible from above. Dorsal plate large, oval. Hypostome long, sides 



Fig. 55. Anlricola coprophilus (Mcintosh). Male, ventral view. From Mcintosh 



(1935). 



