368 PHYTOPHAGA. [ Phyllotreta. 
In damp places, by sweeping Cruciferz, especially Nasturtium officinale and 
Cardamine amara; local; Highgate, Horsell, Aylsham, Reigate, Maidstone ; 
Windsor; Ditchingham, Suffolk ; Hastings; Bretby Wood, Repton; Withington, 
Cheshire; Manchester and Liverpool district ; Northumberland and Durham district ; 
Scotland, rare, Solway and Tay districts; Ireland, Armagh (Johnson). 
P. exclamationis, Thunb. (brassice, F.; quadripustulata, Payk.). 
A small, short, convex species, which resembles a small Aphthona or 
Thyamis rather than a Phyllotreta; oval, convex, black, shining, with 
two yellow patches on each elytron, which are variable in size and are 
rarely united by a narrower or broader yellow line ; antennz testaceous, 
more or less fuscous towards apex; thorax convex, with sides strongly 
rounded, closely and rather finely punctured; elytra very convex, 
much broader than the base of thorax, thickly and somewhat strongly 
punctured ; legs pitchy black, or black, with the tibiz and tarsi more 
or less reddish ; the general colour of the legs, however, is variable. L. 
¢-1l} mm. 
Marshy places; on Cruciferze ; local, but not uncommon in many districts, and 
widely distributed from the Midlands southwards; rarer further north; Northumber- 
land and Durham district, not common, but has been taken in several localities ; 
Scotland, very rare, Solway district ; Ireland, near Dublin. 
APHTHONA, Chevrolat.* 
In this genus the forehead is impunctate and furnished with rather 
distinct lines and tubercles; the anterior coxal cavities are open behind; 
the thorax has no basal furrow; the pygidium is covered, and is 
channelled on its upper surface ; the first joint of the posterior tarsi is 
three times shorter than the tibia, and the spur of the posterior tibiz 
is inserted at the outer side of the apical edge; the species vary very 
much in colour and considerably in size ; about one hundred and fifteen 
are at present known, which are very widely distributed over the 
greater part of the world, and range from Kamtschatka to the Cape 
of Good Hope, South America, and the Australian region; a considerable 
number have recently been described from Central America, and it is 
probable that the genus will ultimately prove to be a very large 
one in point of numbers; about forty species occur in Europe, of 
which eight are found in Britain; these may be distinguished as 
follows :—- 
if Upper surface mostly testaceous or pale yellow, 
. Head testaceous, or ferruginous; size larger . + . A. LUTESCENS, (yll. 
Head black, size smaller. . . - « = . A, NIGRIONPS, Rede. 
IL. Nene surface dark, greenish, bluish, "purplish or 
nigro-neous. 
* Just after the sheet containing the table of genera (p. 333) had gone to press, 
I discovered an error affecting this genus: on page 333, last line, “ APHTHONA, 
Chevr.”’ should be erased, and inserted on page 334, line 9, immediately under 
Puytiorreta, Foudr., at the end of paragraph b*. 
