154 BROOKLYN MUSEUM SCIENCE BULLETIN 3. 3. 
Idaho: Moscow, July (Piper in Nat. Mus.). 
Michigan: Detroit (Hubbard and Schwarz). 
The Alaska specimen has the prothorax slightly depressed above 
and a finer strigate sculpture and the paratype from Detroit, Michigan, 
has the prothorax entirely transversely and more coarsely strigate- 
rugose. 
D. dnhia is not unlike pusilla and could be confused with it, but the 
former has the prothorax more or less distinctly transversely strigate- 
rugose, the impressed median line usually present, and the lateral tubercles 
distinctly separated from the disk; the side pieces of prosternum are 
distinctly strigate and more shining; the elytra are wider with lateral 
margin gradually transversely arcuate from about middle to apex; the 
legs are always darker, the hind femora in both sexes without tooth or 
at most a still smaller tooth than in pusilla and the last dorsal segment 
of the male truncate at apex. 
D. metallica with similar antennae and hind femora without or with 
a very small tooth has a differently sculptured prothorax with lateral 
tubercles less distinct, form more evenly convex, laterally more arcuate 
elytra and finely rugose side pieces of prosternum, which are only near 
the coxae somewhat strigate. 
DoNACiA NEOMExiCANA uew species. 
Elongate, sub-parallel; color above metallic blue or green (males) 
or cupreous (females) ; antennae rufous, the first joint more or less 
metallic, the second, third and fourth occasionally infuscate at apex; 
legs rufous, femora frequently with a more or less distinct metallic spot 
of variable size near apex; body below metallic, last ventral segment 
entirely or only at apex reddish, occasionally all the ventral segments 
narrowly red at apex, or the last four segments more or less reddish. 
Head shortly prolonged behind the eyes, then truncate and dis- 
tinctly constricted; neck moderately wide; eyes moderately prominent; 
median line fine and deep; surface very densely rugose; antennae ex- 
tending to about middle in the male, shorter in the female, third joint 
distinctly longer than second, as long or nearly as long as the fourth but 
generally shorter than the first joint. 
Prothorax about as wide at apex as long; anterior angles distinct 
and usually more or less distinctly rounded but apparently never promi- 
nent; posterior angles at most feebly prominent; lateral tubercle more or 
less distinct laterally, separated from the disk by a moderately deep, 
arcuate impression; sides below the tubercle distinctly but not strongly 
