66 BROOKLYN MUSEUM SCIENCE BULLETIN 3. 3. 
the same. However, to be absolutely certain, I sent a specimen to the 
British Museum to be compared with the type. Mr. Arrow returned 
the specimen with the remark that they are identical. The prolongation 
of the hind tibiae into a spine-like process of the males is of rare occurrence 
in the genus. It is not mentioned in the descriptions of militaris nor 
floridae but on inquiry Mr. Arrow wrote me that it is also present in 
the type specimen. 
The males of the European crassipes have the hind tibiae also 
prolonged internally at apex but into a shorter process which is truncate 
at apex. 
The shape of the prothorax is as in many other species variable. 
Lacordaire described the prothorax a little wider than long and not 
converging behind and Mr. Leng's description says that the thorax is 
narrower at apex than base. Both forms and intermediates are found 
in any locality. The oblique ridge behind the posterior tooth of the 
hind femora is also variable and often broken up into one or more denticles 
and even these are obliterated occasionally. 
The emargination of the elytral apices occurs more frequently in 
the males than in the females. 
The small size, the long and strongly incrassate hind femora and 
the spine-like apical process of the posterior tibiae will easily recognize 
the males. The females look superficially like females of rujescens and 
both have been taken together on the same plant, but the latter have 
shorter and stouter hind femora which are armed below with a distinct 
tooth. 
DoNACiA piscATRix Lacordaire. 
Plate V, figs. I and lo. 
Moderately elongate and depressed; upper surface entirely pale 
with or without metallic tint, golden, metallic green or blue; antennae 
pale or bicolored; legs occasionally entirely pale or femora in apical 
half or less metallic; body beneath metallic green, the last three or four 
ventral segments more or less pale. 
Head feebly constricted behind the eyes; rather finely, densely 
punctate; median line deeply impressed; eyes rather large; antennae 
somewhat stout, third joint longer than second, generally longer than 
first. Prothorax transverse, generally wider at apex than at base ; sides 
more or less strongly sinuate; anterior angles more or less distinct, 
occasionally rounded; posterior angles distinct and rather prominent; 
lateral tubercle generally feeble; anterior transverse impression distinct; 
