598 Mr. D. Sharp and Mr. F. Muir on the ComjKtrative 



very complex and remarkable. Though they are free, they form 

 a ring, the transverse diameter of which is broad, the free extremities 

 are greatly dilated and one much overlaps the other ; moreover 

 each is provided at the base with a large free lobe, projecting in 

 tongue-like shape. This is a very peculiar aedeagus. 



Cryptodus sp. ? 



Median lobe small, membranous. Lateral lobes large, curved and 

 spatulate at tips, meeting together on dorsal side at base, but not 

 on ventral side. Basal-piece tamltour-shape, with a ventral plate 

 consisting of two chitinous sclerites which are consolidated with 

 the ventral edges of the base of the lateral lobes. Internal sac 

 large bearing a complex chitinous armature near apex, of a 

 symmetrical and beautiful shape. 



Lomaptera xanthopus (PI. XL VI fig. 27), 



Median lobe well developed but with exceedingly small chitinous 

 support and no median struts. Lateral lobes medium size, con- 

 solidated to their truncate tips on the ventral side, and at their base 

 on the dorsal side. Articulated in a central position on the dorsal 

 side of the consolidated lateral lobes is an elastic tongue (a) which 

 rises and falls with the evagination and invagination of the internal 

 sac. The basal-piece is large and of the tambour type but with the 

 basal portion short ; with a ventral plate (r^j), rather broad, but not 

 very hard, and not consolidated to the lateral lobes. Internal sac large, 

 without armature ; the opening of duct being situated at distal end 

 on a small prominence, with a small papilla on each side (c). 



In Lomaptera sp. ? (small sp. elytra yellow with strong green 

 reflections ; not in Brit. Mus. Coll.), the lateral lobes are more 

 slender, pointed and turned down ventrally ; the tongue is slender 

 and not articulated at its base but forming a continuous piece witli 

 the lateral lobes. 



Lomaptera sp. % Arfak (chocolate elytra). In this species the 

 tongue is broad, and is bifid at the apex. The ventral plate is very 

 remarkable, being connected distally with the lateral lobes by a 

 large, very hard chitinisation. There is a great deal of hair on the 

 ventral aspect of the lateral lobes. We have this species named L. 

 ciocolatina but do not know whether it has been described. It is 

 one of the numerous species discovered by the Pratts. 



Ischiopsopha hifasciata. 



Differs very strongly from Lomaptera. The basal part of the 

 tambour is still more reduced ; there is no chitinisation of the 

 ventral plate. The lateral lobes form a slender ring with a small 



