schaeffer: donaciini of the new world. 155 
arcuately converging behind; median impression absent or feeble and 
generally obscured by the coarse surface sculpture; basal impression 
distinct; surface more or less shining, closely and coarsely punctate, 
punctures more or less confluent, intervals between the punctures more 
or less distinctly strigate-rugose. 
Elytra shining, ante-median impressions more or less distinct; post- 
median impressions feeble or absent; serial punctures moderate and not 
finer towards apex; surface with more or less distinct transverse rugae; 
intervals very finely and sparsely punctate, at apex rugose; lateral 
margin from a postero-lateral view evenly acute to about middle or a 
little below, then to apex gradually transversely arcuate. 
Body below densely punctate and sparsely pubescent with short 
cinereous hairs; side pieces of prosternum moderately coarsely strigate, 
shining; posterior femora extending to the apex of the fourth ventral 
segment, distinctly but not strongly clavate, at base slightly narrower 
than at apex, below with a very small, acute tooth in the male, female 
without tooth. Length: 6-7 mm. 
Male: First ventral segment excavated at middle; last ventral 
segment depressed at middle of apex; last dorsal segment broadly but 
feebly emarginate at apex, nearly truncate. 
Female: Last ventral and dorsal segments arcuate at apex; lower 
vaginal plate nearly as in emarginata. 
Type, male, and allotype, female, in collection of Brooklyn Museum, 
paratype in Nat. Museum collection. 
New Mexico: Jemez Mts. (Woodgate ex Green and Mason). 
This is the first Donacia found in New Mexico which with Arizona 
and southern California were the only territories from which no Donacias 
were reported. 
From the species with distinctly but not strongly clavate, uni- 
colorous red or bicolored posterior femora with a small or no tooth below 
and rugose prothorax, neomexicana is distinguished by its relatively 
narrower elytra and apparently wide prothorax with its peculiar sculp- 
ture, which consists of rather coarse punctures closely placed and more 
or less confluent, producing a coarse, punctate-rugose appearance, the 
large punctures partly not obliterated but plainly visible. The relatively 
coarsely strigate sculpture of the side pieces of prosternum of this species 
is also present in dubia but that species has a wider elytra and differently 
sculptured prothorax with the punctures when present fine and lateral 
tubercles more distinct. The females are only slightly stouter than the 
males. 
