The Males of Hemarinc and other Sphinges. 6S7 



so many synonyms for all these parts that this explanation 

 is probably desirable. 



None of the folloAving have any detected asymmetry 

 except in the £Bdmagits. 



The asymmetry of the wdoeagus seems to be so universal 

 in Sphinges that only a few, as examples of different mani- 

 festations of the tendency, can be given. They are not 

 always referrible to any fundamental type. 



Aellopus fadus. — There is no recognizable difference on 

 the two sides, except in the mdceagus, which is long and 

 slender, and has the opening to the right side, and beyond 

 it, springing from the left side, is a long hair-like style, of 

 about 2 m.m. in length. 



Sataspes infernalis. — No very distinct unilateral vari- 

 ation is detected ; the i&da^agiis is slender and delicate, 

 and has no spines, etc., but it is not quite positively sym- 

 metrical ; the whole of the appendages are of a very 

 different type to any other species examined. The dorsal 

 process of the tegumen consists of two widely-separated 

 downward- directed hooks. 



Bhodosoma triojms. — Very robust, especially the tegu- 

 men ; the only unilateral structure is the termination of 

 the mdoeagus. The cvdoeagus is short and very thick, 

 about 3"5 m.m. long and 0"7 wdde; an extremely strong 

 sj)ine arises on the left side, and bending down at once, 

 curves round beneath and close to the lower margin of the 

 chitinous aperture of the mdceagus, its sharp apex reaching 

 as far to the right side as that margin of the tube of the 

 xdoiagus. 



S. steUatarum. — The ledceagus is very robust, the open- 

 ing to the left. The right side carries a narrow longitudinal 

 dark chitinous plate, with two rows of hooks directed back- 

 wards, this plate basally fades into the general tube 

 structure, apically it projects beyond the tube in a thickened 

 knob, with an angular end, and giving off on its dorsal 

 margin a large scimitar-like spine or process that curves 

 round the dorsal margin of the tube, and has a row of 

 strong spines along its outer or upper edge. Within the 

 tube are seen two long slender spatula-like pieces, which 

 have probably something to do with the protrusion of the 

 eversible membrane (the true penis ?). I see these in this 

 species, they probably exist in all in some form ; the 

 thickness of the sedmagus makes them more obvious here. 



Macroglossa belts has the xdoeagus very thick and with 



