142 KANSAS UNIVERSITY SCIENCE BULLETIN. 



or by comparison of descriptions or figures in any literature at 

 hand. This cannot therefore be of specific value. 



As to the color of the pellicle of the male scale, Signoret 

 (1869) says that in proteus the male scale is light brown with 

 the exuviae blackish. Newstead (1901) says the exuviae are pale 

 yellow with dark green dorsum. Comstock (1883) says the 

 exuviae of the male are black. In niytilaspiformis, Green says 

 that the pellicle is yellow with greenish center. According to 

 these descriptions, the exuviae of the male in proteus seem to 

 vary from pale yellow with dark green dorsum to black, and 

 there does not seem to be any sufficiently constant difference 

 between the two groups to differentiate mytilaspiformis a valid 

 species. Now there remains only the rudimentary-fourth-lobe 

 characteristic which might be looked to for differentiation, but 

 it is found to be inconstant, being present together with the 

 rudimentary fifth lobe in some individuals and absent in others, 

 and even being present on one side and absent on the other of 

 the same individual. In some the place of the rudimentary 

 fourth lobe is filled by a plate, as in proteus. No valid specific 

 difference between mytilaspiformis and proteus seems to have 

 been found, thus confirming the synonymy determined on the 

 basis of the arrangement and character of the dorsal glands. 



Thae euonymi agrees in all observed characteristics with these 

 except in the presence of the median ventral glands as mentioned 

 above. Since it has never been named as anything but a vari- 

 ety of thew, no discussion of it here is necessary. 



Cockerell (1896, b, and 1896, a) describes viridis, making 

 it a variety of ^/;e/c. Fuller (1897 and 1899) describes a dis- 

 tinct species which he names viridis. Neither of Fuller's de- 

 scriptions is at hand, but specimens received from him were 

 compared with type specimens of t^'Cfe viridis Ckll. and no 

 differences were detected in any pygidial characters. Cockerell 

 (1896, 6), though he names viridis as a variety of thecT, says 

 that he is not certain that it is not a valid species. A discus- 

 sion of the value of the characters which he gives as distinguish- 

 ing it from th'iv, namely, the length of the median plates, which 

 he says are shorter than the lobes, the bright green color of the 

 body of the female, the five groups of ventral glands, the pale, 

 flattened scale, would not be to the point here except so far as 

 they might affect the relation of viridis to proteus. As to the 



