568 Mr. D. Sharp and Mr. F. Muir on the Comparative 
The Chrysomelidae form an interesting series of groups 
which further research will perhaps separate into distinct 
families. The most primitive type is Ovsodacne, which 
approaches Parandra. We find forms wherein the tegmen 
is not divided, though it has a comparatively large cap 
(Timarcha), and others in which the median lobe becomes 
tubular, Orina, etc. Apparently a still more modified 
form is that in which the tegmen is reduced to a delicate 
Y or V-shaped piece. An overwhelming majority of the 
existing species belong to the divisions in which the 
tegmen is thus reduced (Chrysomelinae, Galerucinae, Hal- 
ticinae). The modifications of the tegmen will probably 
be found of considerable assistance in the classification of 
this enormous group of Coleoptera. 
Family CERAMBYCIDAE 
Forms specially examined: Parandra sp. n.? New 
Guinea. Mallaspis xanthaspis Guér. ?,? Colombia. Aromia 
moschata L., England. Chloridolum dorycum Boisd., New 
Guinea. Gnoma ctenostomoides Th., New Guinea. Mono- 
hammus longicornis Th., New Guinea. MMacrochenus querini 
White, ? N. India. And various others not calling for 
special remark. 
Figs. 217 to 221 Pls. LXXV and LXXVI. 
Parandra sp.? (probably undescribed) (PI. LXXV_ fig. 
219), 
Median lobe somewhat flattened horizontally with dorsal and 
ventral edges of median orifice pointed, the orifice extending back 
some distance on each side ; from the dorso-lateral edges of the base 
two flat, narrow struts are given off. Tegmen forming a ring with 
a pair of pointed processes, separate to near their base, on the dorsal 
aspect, and a median strut (cs) on the ventral aspect. Internal 
sac large, without armature. 
Aromia moschata, 
In this well-known insect (Pl. LXXV fig. 217), the sac is largely 
developed, and bears a complex armature near the apex (@). 
Chloridolum dorycum. 
This is similar to A. moschata, but the armature of the sac is 
even more complex, and is shown in some detail in figs. 218 and 
218a Pl. LXXV. There is a deeply cleft chitinous plate (ab) 
bearing hair at the two extremities (ac); a large chitinous plate 
