IN CERTAIN LEPIDOPTEEA. 307 



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men, the uncus was aborted, leaving only a slight irregularly pointed projection from 

 the tegumen, and in each the fleshy portions of the scaphium were partly gone, yet 

 in one case the uncus was perfect; and in each one pair of the " double teeth " was 

 left, and in one case, one of the other pair ; allowing to me to see that their form and 

 armature were exactly as I have described in Merope. In one example the entire soft 

 parts of the scaphium were lacking (perhaps eaten by Psoci), leaving the central mass 

 that supported the serrate teeth merely as a thin transparent shell of homy chitine. 



I remarked that the abdominal cavity, in all the specimens that I examined, of both 

 the forms, and all the included organs, even to the fringe of the valves, were much 

 clogged with meconium and adhering body-scales, received, of course, from females. 



Papilio Homeris, Fabr. (Plate XXX. figs. 1-1.) 



The grand P. Homerus of Jamaica has a prehensile armature of much simplicity, 

 but quite unlike that of any other known to me. The valve is somewhat long, with 

 a rounded point bent-over towards the ventral side. It is dull, dark brown, clad with 

 small scales interspersed with hairs, externally ; internally it is simply hollowed, the scaies 

 scarcely protruding beyond the margin ; but a crowd of very fine hairs spring from 

 some distance within the margin, on both sides, and extend considerably beyond it. 



The horpe consists of a simple rod of brown chitine, hollow throughout, very slender 

 at the base, widening abruptly in the middle into a llattened blade, which terminates 

 in two nearly straight points, of which the dorsal rises above the margin of the valve, 

 and the ventral dives into the hollow. The chitine is darker and, I presume, denser 

 in the vicinity of these points than elsewhere. The whole blade is sparsely beset with 

 long slender bristles. The harpe runs in nearly a straight line along the middle of 

 the valve, through its entire length ; but adheres only by the slender portion. 



The uncus is long and stout, but has only a moderate downward curvature, very 

 regular and graceful, however ; the keel, produced by the united rami or vertical supports 

 of the sides, is deep. Viewed laterally, the uncus ends in a very sharp point ; viewed 

 posteriorly, it is a narrow, tapering spathula. 



The scaphium is broadly boat-shaped, with little depth, and nothing that can dis- 

 tinctly be called a keel ; the " double tooth ' ; on each side is remarkably stout and strong 

 consisting of two conical cusps of shining brown chitine, united on a single basis, seated 

 on an ovate expanse, or dilated lip. These are angular-sided ; and the interior edge, espe- 

 cially of the hinder cusp, is beset with numerous short bristles, from which the extreme 

 points are free. A supernumerary spinous tooth, polished, slender, acute, erect, rises 

 from a knob situate centrally in the midst of the scaphial furrow, close to the extremity. 



The p>enis is rather small and short, little protruded from the abdomen, chifcinous 

 brown, turgid at the extremity, hiaut, not expanded, with no finger-point. 



Papilio Ulysses, Linn. (A. D.) (Plate XXX. figs. 5-8.) 



Valve of more than ordinary dimensions; outline along semioval, bluut-pointed, 

 with a considerable sinuation on the dorsal side of the point. The black, coarse hair- 

 scales of the exterior project notably along the dorsal margin, and around the tip, 



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