( cxxxvi ) 



tegumeu is large and very heavily developed laterally (a form 

 of structure I believe to be very primitive, one that is rarely 

 if ever found in the highest families of the Lepidoptera), with 

 no more than a very narrow bridge on the dorsum ; the union 

 of the tergite and sternite organs being quite perceptible 

 here. In the sternite section the harpagones are largish, 

 there is a trough, along which rests the sedceagus, that is 

 attached to the laterals of the tergite and is evidently capable 

 of considerable movement; the cingula is composed of a 

 broadish membrane with two strong curved arms in the 

 front, the whole being confined to the sternite ; the saccus 

 is very imperfect, being almost a part of the cingula, with its 

 development almost entirely frontal instead of rearwards; 

 the aedoeagus is quite small, generally more or less horn- 

 shaped. Our common humuli is so t}^ical of European and 

 American, as well as of many exotic species, that I give a 

 more detailed description of its organs. 



Hepialus humuli, L. 



The tegumen consists of two very broad lateral cheeks 

 occupying the whole of the tergite, and bridged over by an 

 excessively narrow saddle; the upper part of the lateral 

 area is wedge-shaped, rapidly tapering to a blunt point, being 

 deeply excised below and then developed into a broad adze- 

 shaped frontal projection toothed on its fore edge, the adze 

 shape necessarily involves a deep excision on its lower edge ; 

 the sedoeagal trough is attached at the base of the excision, it 

 is also attached to the rear of the lateral cheeks, and might at 

 first sight be thought to belong to the tergite section, this, 

 however, is not in reality the case, as I have no doubt from 

 the analogy of other families that it really belongs to the 

 sternite ; the harpagones are moderately hairy and are 

 peculiar, their shape would best be likened to the foot of a 

 stocking cut ofE at the ankle and pressed flat, the ankle 

 portion being affixed to the cingula well above the saccus, 

 which might almost be described as bag-shaped. Even the 

 genus Phassodes from Fiji follows closely this line of structm-e, 

 though, as would be expected, the shapes of the different 

 parts differ. 



