The Males of Hcmarine and other Sphinges. G89 



the opening be pressed together, the left side yielding 

 most ; let the right side be a little longer than the left, 

 and margined by a thick chitinous ridge, beginning by a 

 thicker portion at the extreme dorsum, where the left 

 side is hinged to it and is capable of moving to and fro, 

 forming a lid or door; the chitinous margin gets narrower 

 as it approaches the lower angle, ending in a point, its 

 outer edge carrying a row of strong sharp spines. The 

 appearance of this ridge is almost identical with the spine 

 in stellatarum, but there it is free, here it is attached to 

 the edge throughout its length. 



Ce. cnphorhm. — The structure of the o^'dmagus is very 

 similar to that in lineata. The extremity is laterally 

 compressed, and rounded from above downwards, the right 

 side is firm, the left forms a valve or flap capable of closing 

 against and within the right, or opening out. At the 

 upper and lower angles are small soft processes. The right 

 side has a thick chitinous margin, with hooks almost hidden 

 along its basal margin, and smaller than those in lineata; 

 except for its recalhng lineata, it would not, as lineata does, 

 suggest the considerably different structure of stellatarum. 



Ce. fjalii. — -The xdmagus has a delicate cylindrical tube, 

 the angular termination is dorsal, and on the right (45°) it 

 terminates in an angular margin like an arrow-head, added 

 to it, i.e. at its central protruding angle it is a narrow 

 piece, clearly marked off from (and raised above) the tnbe 

 behind it, and continues so to each lateral point, these are 

 nearly but not quite the same as each other, the lower 

 (right one) running more directly basally, each carries 

 several minute spines at its proximal end. 



Theretra lueasii has the right side below strongly 

 chitinized, towards the extremity of the xdmagus, above 

 this, quite to the right side it is produced to a bhmt point, 

 longer than a similar process on the left side, from 

 practically the extremity of this a short spine is directed 

 upwards and a little to the left along the upper part of the 

 left margin ; its length is about '4 m.m. 



H. celerio. The xdeeagus is a slender tube about 

 '3 m.m. in diameter, regular and cylindrical, on the right 

 side somewhat dorsally is at the extremity a thickened 

 darker chitinous piece produced to a point. One would 

 say this was a symmetrical dor?al structure, and that the 

 tube was turned round, dorsum to the right, 45°, were it 

 not that there runs down from either side the apex outside 



