( cliv ) 



In Lambessa staudingeri, B.-B., 



a species most interesting because the female is wingless, i. e. 

 tlie wings are strictly rudimentary, tlie saccus is very large and 

 receding, and broad enougb at its fore edge to be articulated 

 in its lower half with the harpago, and in its upper half with 

 the cingula; this appears to be near Epicnaptera in its general 

 design; the harpago has a broad rounded lobe at the base 

 projecting forward in a long arm along the upper margin ; 

 the aedoeagus is broadish, curved, moderately even in width and 

 terminating in a trumpet-shaped orifice, with a long projecting 

 pointed lower lip ; the vesica appears to have no armature. 



The Saturnidae are highly developed and generally speaking 

 are very simple ; the cingula is a simple continuous collar with 

 no sign of sternite or tergite sectioning. The tegumen is 

 obvious and again simple in structure, as also are the harpa- 

 gones; the sedoeagal trough is the only atavic feature, this 

 being fairly large with tusk-like sclerites. Two genera must 

 be sufficient to illustrate their development at the moment. 



In Saturnia pavonia, L., 



the cingula is a very narrow ribbon of chitin, rapidly ex- 

 panding on the tergite so as to form an ample hooded tegumen, 

 to which is articulated the deeply bifid uncal-like apex con- 

 sisting of two very strongly curved scimitar -like arms in the 

 front, curtained entirely in at the rear ; the harpago is rounded, 

 large, highly excised in the lower front apex, wherein is a 

 teat-like process near the front ; the sedoeagal trough is a broad 

 short collar with the upper margin developed into large tusk- 

 like horns in the front. 



Aglia tau, L., 



is very similar to Saturnia in some particulars ; the cingula 

 is very close but is developed more in the rear of the dorsum, 

 whereas in Saturnia it is frontal ; the uncus-like apex of the 

 tegumen is, however, very much larger, very slightly excised 

 at the extreme tip and terminating in a blunt point on each 

 side ; the harpago is large and rounded, without the fore 

 excision, but with a long highly curved arm on the inner sur- 

 face terminating in a long sharp point that is furnished with 

 a ridge of fine short spines ; the sedoeagal trough is a simple 



