558 Mr. D. Sharp and Mr. F. Muir on the Comparative 
chitinous on the outer edges (ms) and membranous down the 
middle (m). Tegmen forming a ring, with a large dorsal cap-piece 
slightly emarginate at tip, and a keel-like strut on the ventral aspect. 
Internal sac long with two small pads (a) of chitinous short 
spines, 
Caryoborus nucleorum (Pl. LX XII fig. 197). 
Median lobe large, the distal two-sevenths forming a flattened 
tube, with the ventral edge of the median orifice pointed and pro- 
jecting beyond the dorsal edge, the basal five-sevenths forming 
a large sclerite on the dorsal aspect. Tegmen forming a ring, 
with lateral lobes consolidated together forming a cap-piece, 
slightly emarginate at tip; at the base of the lateral lobes and 
consolidated to them there is a large, inflated semi-chitinised 
membrane (a) which is consolidated to the median lobe; this may 
represent a chitinisation of the first connecting membrane. On the 
ventral side is a Y with a long strut (). Internal sac long, without 
complex armature. 
This family comes within the Chrysomelid group. 
Family CHRYSOMELIDAE. 
Forms examined: As this is one of the most extensive 
divisions of Coleoptera, we arrange the species specially 
studied in thirteen groups. 
1. ORSODACNINAE. Orsodacne nigriceps Latr., England. 
2. DoNaActINAE. Donacia (Plateumaris) sericea L., and 
comari Suffr., D. bidens Ol., semrewprea Panz., and lemnae 
Fabr., England. 
3. SAGRINAE. ecynodera balyi Clark, Australia. 
Carpophagus banksiae Macl., Australia. §Diaphanops 
westermannt Schonh,, Fremantle, Australia. Polyoptilus 
sp. aff. erichsonie (not in Brit. Mus. Coll.), Australia. Sagra 
amethystina Guér. var, W. Africa. Sagra nigra Ol, 
Assam. 
4. TIMARCHINAE. Zimarcha geniculata Germ., Asturias. 
T. tenebricosa Fabr., England. 
5, CRIOCERINAE. Crioceris asparagi L., England. 
6. CLYTHRINAE. Labidostomis longimana L., Istria. 
Clythra laeviuscula Ratz., Pyrenees. Lachnaea palmata 
Lac. ? Pyrenees. Sawxinis saucia Lec., California. 
7. CRYPTOCEPHALINAE. Cryptocephalus auwreolus Suffr. 
England. C. asturiensis Heyd.? Asturias. 
