620 Mr. D. Sharp and Mr. F. Muir on the Comparative 
(3) PHYTOPHAGOIDEA (OR RHYNCHOPHORO-PHYTOPHAGOUS 
DIvIsIon). 
We cannot point to any difference in plan of structure 
between the Rhynchophora and the Phytophaga. In 
Chrysomelidae and Curculionidae we find ourselves con- 
cerned with series of developments; and the Scolytidae 
within their comparatively narrow limits also exhibit a 
similar phenomenon.* Cerambycidae and Brenthidae are 
each so far as we have seen much more homogeneous. 
Of Anthribidae we have been able to examine but few 
forms, and these have not led us to suppose that any 
great diversity will be found within their limits; this 
family may well be studied in connection with Selus in 
the Curculionidae. 
In this enormous complex the tegmen forms, in the 
more simple kinds, a ring around the median lobe, with 
a dorsally placed cap-piece, which is usually bilobed ; 
the median lobe assumes the tubular condition in an 
abbreviated form only, the proximal part consisting of 
two dorsal struts; the first connecting membrane is large, 
and allows of a considerable movement of the median 
lobe within the tegmen; the internal sac is long, and 
extends through and beyond the median foramen. These 
conditions are displayed in Parandra, and we may remind 
the reader that they are those of a primitive (and 
suppositive) Cucujid. It is right to add here that we 
do not understand the phylogeny of the lateral lobes, 
because in this division it is specially obscure, and may 
be multiple, if they are represented at all. 
The characters are very persistent in Cerambycidae, 
and apparently also in Brenthidae; most of the specialisa- 
tions being found in the sac and its armature. Orsodacne 
(usually placed in Chrysomelidae) is interesting, as possess- 
ing the simpie conditions of the Cerambycid Parandra. 
Timarcha has no free lateral lobes but has a large dorsal 
portion of tegmen, and at the same time two well- 
developed median struts,—a somewhat anomalous form, 
therefore.t Specialisation in the Chrysomelidae occurs as 
* This is not displayed in our illustrations, but is derived from 
Lindemann’s excellent study of this family, mentioned under 
Scolytidae. 
t Weise (Deutsche ent. Zeitschr. 1895, p. 26) has already called 
attention to the aberrance of Orsodacne from Chrysomelidae. If we 
