304 HETEROMERA. 
the tenth, ferruginous or reddish-brown ; prothorax transverse, rather convex, somewhat strongly margined, 
the margins shallowly but broadly grooved within, the sides feebly sinuate, though scarcely narrowing 
from a little before the middle to the base, obliquely converging and sinuate and slightly crenulate 
in front, the apex shallowly emarginate, the anterior angles broadly rounded, the base bisinuate, the 
basal fovew deep, the hind angles subrectangular, the disc slightly transversely impressed in the middle 
just before the base, the surface rather coarsely, somewhat closely, and subequally punctured (much more 
finely so than the head), and sometimes with a narrow ill-defined smooth longitudinal space on the basal 
half of the disc; elytra moderately long, subparallel or scarcely widening from the base to the middle, the 
humeri rather prominent, somewhat deeply striate, the strie rather coarsely and closely crenate-punctate 
outwardly and finely punctured on the disc and at the apex, the interstices feebly convex on the disc, 
more strongly so outwardly, and finely and quite distinctly punctured ; legs reddish-brown or ferrugi- 
nous; beneath reddish-brown, shining, sparingly and finely punctured, the ventral segments 1-3 more 
distinctly so and also longitudinally wrinkled and similar in both sexes, the flanks of the prothorax very 
finely strigose ; prosternum closely and very coarsely punctured, rather broad, slightly declivous and 
then horizontally produced, the apex with a distinct raised point; mesosternum declivous, narrow, 
comparatively deeply excavate. 
Length 5-8 millim.; breadth 23-34 millim. (¢ 9.) 
Hab. Guatemata, El Tumbador, Volcan de Atitlan (Champion). 
Nine examples. This insect is perhaps nearest allied to 7. sinwaticollis, the thorax 
being somewhat similarly shaped though more broadly grooved within the lateral 
margins; it will, however, be readily known from that species by its less parallel form, 
more coarsely punctured head, rather convex and more distinctly punctured inter- 
stices, more coarsely punctured outer strie, strigose flanks of the thorax, &c. From 
Nautes belti it differs in its smoother under surface, differently shaped and less coarsely 
punctured thorax, the still more coarsely punctured head, the differently formed pro- 
and mesosterna, &c. 
The coarse close punctuation of the head is a marked character of 7. puncticeps ; 
the ventral segments 1-3 in the male are not impressed and pubescent in the middle 
as in the allied species. 
30. Tarpela tropicalis. (Tab. XIII. fig. 10, ¢.) 
Oblong ovate, rather convex, metallic bronzy green, sometimes bluish, shining. Head rather short and convex, 
somewhat coarsely, moderately closely, and subequally punctured, the epistoma not clearly defined, the 
usual dividing groove represented at most by a shallow fovea in the middle, the antennary orbits scarcely 
extended laterally and but little swollen; antenne stout, moderately long, reaching to about the middle of 
the elytra in the male, widening a little outwardly, the penultimate joints subtriangular, the apical joint 
much longer and stouter than the tenth in the male, piceous; prothorax rather broader than long, 
convex, strongly margined, the margins narrowly grooved within, the sides slightly rounded about the 
middle, straight or a little sinuous behind, and narrowing and feebly crenulate in front, the apex 
rather deeply emarginate, the anterior angles produced in front and narrowly rounded, the base rather 
strongly bisinuate, the basal fovez very deep, the hind angles subrectangular, the disc rarely with a 
transverse sinuous impression before the base, the surface rather coarsely and somewhat closely punctured 
(not quite so closely as the head), the punctures finer and more scattered at the sides and base ; elytra 
rather long, strongly margined, the humeri moderately prominent, very slightly rounded at the 
sides (almost subparallel), widest about the middle, deeply striate throughout, the striee somewhat coarsely 
crenate-punctate towards the sides, much more finely so on the disc and at the apex, a row of coarse 
irregular impressions on each side within the margins, the interstices a little convex and finely and 
sparingly punctured; beneath brownish-piceous, shining, almost smooth, the flanks of the prothorax with 
