572 Mr. D. Sharp and Mr. F. Muir on the Comparative 
of the lateral chitin strips proceed two median struts (ms). Tegmen 
formed of a semi ring-piece with a very strong central strut on the 
ventral face. A long first connecting membrane (cm 1) connects the 
tegmen to the median lobe, and a very long second connecting 
membrane (cm 2) connects the tegmen to the body wall; the basal 
part of this second connecting membrane (cm 2) is chitinised and 
forms a tube around the aedeagus ; on the right of it is attached the 
“spicule” (sp). Internal sac large, without armature. 
Obs.—We have examined various other Curculionidae 
without finding distinctions of great importance. But the 
various specialisations will probably prove to be of much 
assistance in the classification of this enormous complex. 
Comparison of the cap-piece of the tegmen in Attelabini, 
Rhynchitini and Brachycerini with long-rostrum-forms 
(2.e. probably higher) like Jecocorynus is suggestive of 
this. 
Family SCOLYTIDAE = (Ipidae of some). 
Form examined: Zomicus (Ips of some) laricis Fabr., 
England. 
Fig. 226 Pl. LX XVII. 
The male organs of many of this family were carefully figured 
and described by Lindemann* and again by Verhoeff.t It is a 
Rhynchophorous type. We figure Tomicus laricis (P]. LXXVII 
fig. 226). Median lobe short and tubular, with a pair of slender 
median struts. Tegmen ring-shaped with a central strut on ventral 
side (a). Internal sac fairly long, with a thin membranous flagellum 
arising from the apex, supported by a couple of thin chitin rods (6). 
We must refer workers in this group to Lindemann’s above- 
mentioned paper for details of the various species. 
The evolution of the tegmen in this family appears to 
be from a ring-piece with well developed lateral lobes, to 
reduction of the lateral lobes, the ring-piece being correla- 
tively reduced into a small Y-piece on the ventral side of 
the median lobe. Cf. remarks on Chrysomelidae. 
Family PLATYPIDAE. 
Form examined: Platypus (sp.), Honolulu. Crossotarsus 
barbatus Chap., New Guinea. 
* Bull. Soc. Imp. Mose., Vol. XLIX (1875) No. 1. 
+ Archiv f. Naturgesch. 1896. 
