IN CERTAIN LEPIDOPTEKA. 303 



attenuated plate. It adheres so tenaciously, that I did not succeed in separating it from 

 the lining-membrane without much laceration. 



Another example agreed minutely with this description. The only differences that I 

 could detect were, that the valve was slightly narrower, and more acutely pointed, the 

 outline being a nearly perfect isosceles triangle. The harpe extended to the very point of 

 the valve ; yet along its edge I could count only fourteen teeth. 



The abdominal armature, in general, agrees with such examples as P. Ilayo. The 

 uncus (in the specimen figured) Avas long, narrow, the margins much elevated, displaying 

 a deep keel, and was so strongly downcurved that the small, polished, spathulate tip was 

 bent considerably within the perpendicular ■'. Its upper surface is partially concealed 

 under a dense thatch of long arching hair, mingled black and yellow, which, springing 

 from its basal part, projects far beyond its doAvnward curve f . 



The scaphium is of moderate dimensions, and of normal form, with a rather small 

 keel. The lateral expansions, " gunwales," are wide, and are furnished with " double 

 teeth," the principal of each pair being sufficiently conspicuous, projecting almost 

 horizontally. There is a strong projecting point from each lateral edge of the tegumen. 



The penis is moderately large, trumpet-mouthed, the expanded lips notched (corru- 

 gated ?) along the edges, and surmounted by a short finger-point. Its protrusion from 

 the abdomen is high, even so as sometimes to press the under side of the scaphium. 



Fig. 16, the abdominal organs viewed from the right side with the right valve removed ; 

 the left in situ, shown in outline. 



Papilio Akcttjrus, Westw. (A. D.) (Plate XXIX. figs. 17-19). 



Fefoe-outline that of a Gothic arch, with the point rounded and the dorsal side a little 

 hollowed ; a wide fringe of coarse brown hair-scales along the dorsal margin. The cavity- 

 floor has an abrupt depression along its middle, broad at the base, and tapering to the 

 point. 



Harpe a slender wire bounding this depression ventrally, rising at about two thirds of 

 its length into a rather broad blade, the edge of which leans-over dorsally. More highly 

 magnified, it is seen to be somewhat semiovate in outline, curved at the tip into a strong 

 hook, and beset, along its free edge, with a number (about forty-five) of minute close-set, 

 sharp saw-teeth, the intervals between which run down in grooves upon the blade ; in 

 other words, the teeth are the extremities of ridges. The whole harpe can be separated 

 from the valve only by tearing the adjacent portions of the lining-membrane, to which 

 it appears to adhere organically, for almost its whole length. Some examples have the 

 blade less irregular in form. 



The abdominal organs are almost the counterpart of those in P. Mayo. The uncus 

 presents nothing worthy of remark. The scaphium is scarcely distinguishable from 



* But examples differ in this respect, the uncus being, in some, nearly horizontal at first, and abruptly and strongly 

 curving toward the tip. 



t The organ is perhaps unusually subject to malformation ; for, in one example, its form and curve were quite 

 asymmetrical, and it was accompanied by a supernumerary tooth, much like itself, but shorter, on its left side. Yet 

 another example had a shapeless knob projecting from the right side of the tegumen. 



