128 THE CANADIAN ENTOMOLOGIST. 



the type of ahcnata in that the lunate spots on the secondaries are normal 

 except in colour, which is the same as those in P. troilus. The sub- 

 marginal row of spots on the primaries is wanting, the first one very 

 faintly indicated. In other respects it does not differ from ahcnata. 

 Although the type specimen of aliinata has no locality label on it, we have 

 good reason to believe it to be from this region. The specimen in Dr. 

 Skinner's collection was taken in Fairmount Park. 



Papilio t7'oilus — Common. 



Papilio turnus. — Common. Philadelphia seems to be about the 

 latitude where the yellow and black (glaucus) females are found in equal 

 numbers, and consequently, as is to be expected, interesting gradational 

 forms have been taken here. A number of specimens of ochraceous 

 females have been taken. One remarkable specimen was captured by 

 Dr. W. L. Abbott at Chestnut Hill, and is now in the collection of Dr. 

 Herman Strecker, of Reading. Perhaps the best way to convey a correct 

 impression of its appearance is to say that were a black $ to be pasted 

 over a yellow ^ and the black then torn off in irregular shreds leaving 

 the yellow to show from below, the specimen so treated would closely 

 resemble this very striking form. The lines where the black and yellow 

 join, while irregular, are abrupt. There is no flaking or commingling of the 

 two colours. Another specimen, which, like the above, is believed to be 

 unique, instead of being bi-laterally divided like those figured on plate 5, 

 of Vol. II., of " Butterflies of North America," by Mr. W. H. Edwards, is 

 divided antero-posteriorly. The primaries were glaums, and the second- 

 aries normal turniis. This specimen is also in the collection of Dr. 

 Strecker. 



Papilio cresphontes. — Occasionally taken. A fine pair have been seen 

 in Fairmount Park, and several have been taken near Angora. 



Pier is protodice. — Pieris rapce seems to have pretty well supplanted 

 the indigenous species protodice, the latter having been much more com- 

 mon some years ago. At the present time it may be said to be one of 

 the rarer species. At Gloucester its food plant has been observed to be 

 the common pepper-grass (Lepidium Virginicum). 



Pieris rapce. — Painfully common. A number of specimens of a marked 

 varietal form have been taken. They may be known as follows : — 



Pieris rapce, var. immaculata, nov. var. — Same size and form as the 



