76 HETEROMERA. 
of E. arizonensis; they have the flanks of the prothorax densely and roughly punctured, 
and the eyes narrowly separated. The punctures of the elytral series in the Sonora 
examples are coarser than the description would lead one to expect, but in the Jalapa 
specimen they are finer. In the absence of further material it is not advisable to treat 
these as distinct. 
2. Kustrophus marginatus. (Tab. IV. fig. 2.) 
Oblong ovate, moderately narrowed behind, castancous or fulvous, a large transverse patch (sometimes divided 
down the middle into two) on the disc of the prothorax, and the whole of the disc of the elytra from the 
base nearly to the apex and laterally to the eighth row of punctures, piceous-black, the entire surface 
thickly clothed with rather long brownish pubescence, shining. Eyes large, approximate ; antenne with 
joints 1-4 ferruginous, 11 flavous, 5-10 black or brownish-black, 6-9 rather longer than broad, 10 about 
as broad as long; prothorax very finely and closely punctured, the basal fovew feebly indicated and with 
a few coarsish punctures laterally; elytra (if viewed from above) forming a continuous outline with the 
prothorax, moderately coarsely striate-punctate, the punctures continued to the apex and quite distinct 
from those of the interstices, the latter flat, and very closely and finely punctured; beneath castaneous or 
reddish, very closely and finely punctured and pubescent, the venter still more densely punctured ; 
prosternum narrowed behind and not prolonged to meet the mesosternum, the latter keeled, but declivous 
in front; legs ferruginous, the four hinder tibia strongly transversely ridged on their outer edge. 
Length 53-6 millim.; breadth 23-37 millim. 
Hab. Mexico, Cordova, Playa Vicente (Sallé), Vera Cruz (Sallé, Hoge), Jalapa (Hoge) ; 
GuaTEeMaLa, Yzabal (Sallé); Panama, Bugaba (Champion). 
This species differs from the allied forms in having the thorax on all sides and the 
elytra from the base to the apex broadly margined with fulvous or castaneous. It is 
less narrowed behind than the North-American £. bicolor. The mesosternum is 
distinctly keeled in front, the species thus differing from typical Hustrophi, but not to 
the same extent as in Eustrophopsis, the anterior face of the keel being declivous and 
not vertical. Labelled Hustrophus marginatus, Chevr., in the Sallé collection. 
3. Eustrophus ovatus. (Tab. IV. fig. 3.) 
Ovate, castaneous, strongly narrowed posteriorly, the disc of the prothorax indeterminately suffused with 
piceous, the sides of the elytra from the base to the apex broadly and indeterminately fulvous, the entire 
surface thickly clothed with rather long fulvous pubescence, shining. Eyes large, approximate ; antenne 
with joints 1-4 ferruginous, 11 yellow, 5-10 black, 6-9 rather longer than broad, 10 about as broad as 
long, 11 much longer than 10 ; prothorax very finely and closely punctured, the basal fovezx indistinctly 
indicated and with a few coarsish punctures laterally; elytra forming a continuous outline with the 
prothorax, moderately coarsely striate-punctate, the punctures continued to the apex, the interstices flat, 
and very finely and closely punctured ; beneath castaneous ; prosternum narrowed almost to a point 
behind, the mesosternum slightly keeled but declivous in front; legs ferruginous, the four hinder tibie 
strongly transversely ridged on their outer edge. 
Length 53 millim.; breadth 23 millim. 
Hab. Guatemata, Zapote (Champion). 
A single example. This species is allied to #. marginatus, but is much more ovate 
in shape, the elytra being strongly narrowed behind. . ovatus is still more ovate in 
