568 Mr, D. Sharp and Mr. F. Muir on the Com])araUvc 



The Chrysomelidae form an interesting series of groups 

 which further research will perhaps separate into distinct 

 families. The most primitive type is Orsodacne, 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 {Ghrysomelinae, Galcrucinae, Hcd- 

 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 .vanfhaspis Guer. ?, ? Colombia. Aromia 

 moschata L., England. CJiloridolum dor>/rnm Boisd., New 

 Guinea. Gnoma ctenostomoidcs Th., New Guinea. Mono- 

 hammus longicomis Th., New Guinea. Macrochcnus guerini 

 White, ? N. India. And various others not calling for 

 special remark. 



Figs. 217 to 221 Pis. LXXV and LXXVI. 



Parandra sp. ? (probably undescribcd) (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 (PI. LXXV fig. 217), the sac is largely- 

 developed, and bears a complex armature near the apex (a). 



Chlo ridoh cm doryci i m.. 



This is similar to A. moschata, but the armature of the sac if 

 even more complex, and is shown in some detail in figs. 218 and 

 218a PI. LXXV. There is a deeply cleft chitinous plate (ab) 

 bearing hair at the two extremities (ac) ; a large chitinous plate 



