278 PHYTOPHAGA. [Donacia. 
Female with the upper side sneous or coppery, and more shiny, the 
thorax closely punctured, the fifth ventral segment broadly truncate 
at apex, the posterior femora more slender and armed with a small 
tooth, and the elytra punctate-striate with the interstices distinetly 
strigose. 
On aquatic plants, Carex, &c., May and June; local and not common; Horsell 
(Surrey). Battersea, Greenwich, Maidstone; Birchington; Dover; Winchester; 
Devon; Bristol; Swansea; Knowle, near Birmingham ; Cambridge. 
HE MONTIA, Curtis. (Macropléa, Hoff.) 
This genus contains at present about thirteen species, of which five 
are found in Europe, and the remainder have been described from 
North America and Mexico; three or four of the recently described 
species appear to be now considered as merely synonyms of former 
species; they much resemble Donacia in shape, but may be easily 
known by their non-metallic upper surface, and the strong spine at the 
external apical angle of elytra; the tarsi are very long, the first three 
joints not being pilose beneath, and the onychium being as long or 
longer than the preceding joints and terminated by very strong claws. 
The larva of Hemonia Curtisi differs from that of Donacia in having no ocelli or 
labial palpi, and the antenne consisting only of two joints, and more particularly in 
the fact that one of the stigmata is situated on the under-side of the prothorax. 
I. Spine at apex of elytra shorter; average size 
smaller ; posterior femora scarcely clavate at apex . H. Currist, Lac. = 
II. Spine at apex of elytra longer ; average size 
larger; posterior femora distinctly clavate at apex . H. APPENDICULATA, Panz. 
(equseti, F.) 
H. Curtisi, Lac. (Gyllenhali, Lac. ; zostere, var. Curtist, Weise). 
Head black, thorax testaceous with two black lines or spots on each, 
elytra testaceous with black punctured lines, under-side black clothed 
with yellowish-silvery pubescence, which is sometimes golden, legs 
clear testaceous with the tarsal joints more or less fuscous ; head closely 
punctured, impressed, antenne long, dark with base lighter, pubescent, 
inserted near one another ; thorax about as long as broad, very finely 
sculptured, with the anterior angles slightly prominent, and the sides 
rather strongly contracted a little behind these, dise with two black 
lines or patches, elytra much broader than thorax, gradually contracted 
towards apex, with the external angle produced into a sharp spine, 
and the internal angle obtuse, almost rounded, or produced in a small 
tooth; the strie are black with black, moderately strong, punctures ; 
legs long, yellow, tarsi more or less fuscous. L. 43-6 mm. 
Male with the first ventral sezment of the abdomen longitudinally 
impressed, female with the first ventral segment even, and the posterior 
tibie bisinuate internally. 
On Potamogeton pectinatus and Zostera marina, in brackish water near the coast ; 
