ODONTOCERUM ALBICORNE 59 



eggs, but this egg mass is rounded, and the insect 

 itself bears little resemblance to the grannom, 

 besides differing in the spur formula. 



I give a figure of the male genitalia, which 

 show a further difference in the arrangement 

 of the various sexual organs (Fig. 30). Lepido- 

 stoma hirtum occurs much later in the season, 

 on the Test about August or September. 



Family . . ODONTOCERID^E 

 Genus . . Odontocerum 

 Species . . albicorne 

 Spurs, 2.4.4. 



PLATE XII 



McLachlan placed Odontocerum albicorne in odonto- 

 the family of the LEPTOCERID.E, but states that SKne. 

 the genus is highly specialised, and that he had Grey 3edgfe< 

 seen no extra European form. He suggests 

 that it might well be removed from the Lepto- 



FiG. 31. Odontocerum albicorne, $ , portion of 

 antenna, highly magnified. 



cerida, and Ulmer has adopted his suggestion. 

 It is a large, greyish caddis-fly with stout, white, 

 toothed antennae, from which the name is 

 derived, and is a striking-looking insect, quite 

 common both on the Test and the Dove. The 

 antennae are so peculiar in appearance that I 



