IN CERTAIN LEP1D0PTEEA. 301 



Papilio Menestheus, Drury. (Plate XXIX. figs. 4-6.) 



Valve-outime a long, narrow, pointed arch, swelling on the dorsal, excavated on the 

 ventral side ; fringed with black bristly hairs around the point, which grow from within 

 the margin, and disguise its form ; the ventral margin, from the excavation downward, 

 fringed with close-set long white hair-scales, connected with the clothing of the exterior. 



The harpe, a slender curved rod of polished black chitine, running up close to the 

 ventral margin, and following its outline; it sends off a strong, acute, conical spine 

 about the middle, which is free, pointing to the dorsal base; in its terminal half, it 

 expands into an ovate blade, convex ventrally, concave dorsally, standing on one edge, 

 and having the free edge, as well as the spine, minutely serrate. PI. XXIX. fig. 4 

 represents the right valve, with the harpe in situ ; fig. 5, the harpe dissevered from the 

 valve, viewed ou the stage of the microscope as a transparent object. It is now wholly 

 of a rich sienna-brown ; the edge cut into curved spinous teeth, far more minute and 

 far more numerous than I have been able to figure. The side, moreover, is marked 

 with a multitude of fine slanting lines crowded together, which, by delicate manipu- 

 lation of the magnifying power, resolve themselves into so many linear series of very 

 minute pits on the surface, the edge of every one reflecting a semicircle of light. 



The abdominal apparatus has much in common with that in P. Beiphontes, &c. ; and 

 the valvular armature may be resolved into the same type (fig. 6). 



Papilio Pammox, Linn. (Plate XXIX. figs. 7-9.) 



The valve and the harpe belong to that genera] type which we see in the Memnon 

 group, the former presenting little notable, the latter coming near to the forms in Deiphontes 

 and Ascalaphus, especially when it is detached from the valve, as at PL XXIX. fig. 8; 

 for, strange as it may seem, the outline of the harpe, when detached, is not always the 

 same as when it was in situ. In this case, the disk, which takes a hatchet-form, occupies 

 a much greater area of the valve (fig. 7) than in the species named ; it is, as in them, of 

 polished, pellucid, brown chitine, the edge serrated, rather unevenly, the whole stem (the 

 haft) and a broad area at the back of the blade (shown at tig. 8) having been in contact 

 with the floor of the valve, while the blade itself stood up free. 



The uncus is slender, curved almost to a semicircle, with a small spathulatc tip, a 

 moderate vertical divaricate beam below, notched on each ramus, and the ridge crowned 

 with erect hairs (fig. 9), which do not diminish in height to the tip, but end abruptly. 



The scaphium is Avell developed, nearly free from lateral folds; the "double teeth" 

 prominent, the principal one of the pair projecting obliquely towards the tip of the uncus : 

 the fleshy keel thin, short, but very deep, ending in a minute point. The jJCnis is long, 

 moderately thick, truncate, scarcely expanded. 



At the bottom of the abdominal area (fig. 9) is shown the nearer of the pair of pro- 

 minent angular knobs, to which had been attached the triangular base of the harpe- 

 shaft, and that of the right valve. 



Papilio Agaves, Drury. (Plate XXIX. figs. 10-13.) 



Prom a certain resemblance in the form and colours of this South- American butterfly 

 to the Indian P. Sector — near which it is placed, in efforts made by entomologists to 



