EUSTROPHUS.—EUSTROPHOPSIS. v7 
shape than the North-American EZ. bicolor, and is also less elongate than that insect. 
The differently-shaped prosternum will distinguish E. ovatus from Eustrophopsis. 
EUSTROPHOPSIS. 
Last joint of the maxillary palpi moderately long, subcylindrical, obliquely truncate at the apex, that of the 
labial palpi oblong ovate; mentum trapezoidal, as long as broad; ligula prominent, deeply emarginate, 
broadly rounded on each side in front; maxille with the outer lobe broad, the inner lobe short and very 
narrow; mandibles strongly bifid; labrum prominent, rounded in front; head vertical; eyes deeply 
emarginate in front, variable—usually very large and approximate, or narrowly separated, sometimes 
smaller and more distant; antenne rather short11-jointed—4 shorter than 5, 5-11 much broader and 
flatter than the others, 11 ovate and longer than 10; prothorax strongly transverse, rapidly narrowing 
from the base, with shallow or indistinct basal fovee, the base bisinuate and with strongly produced 
median lobe; scutellum rather large; elytra the width of and forming a continuous outline with the 
prothorax at the base, with or without serial rows of punctures; coxe widely separated; prosternum 
broad, horizontal, parallel or nearly so between the cox, prolonged behind, the apex broad and more or 
less deeply emarginate to receive the sharply keeled produced mesosternum, the latter raised in the 
middle to the level of the prosternum, vertical in front, acuminately prolonged behind, and its apex 
received in the longitudinal median groove of the metasternum; legs moderately long, the penultimate 
joint of the tarsi not lobed, the anterior tarsi not dilated in the male, the four hinder tibie with trans- 
verse ridges on their outer edge ; tibial spurs moderately long, equal in length, and not pectinate beneath, 
those of the hind pair not longer than those of the intermediate pair; first joint of the hind tarsi nearly 
as long as the following joints united; form ovate or elliptical, broad, convex. 
This genus is proposed to include numerous Tropical-American species, most of which 
are undescribed as yet. Orchesia 15-maculata, Casteln., may be taken as the type*, 
and Eustrophus ochraceus, Motsch., is also here referred to it. Hustrophopsis is closely 
allied to Hustrophus and Holostrophus, from both of which the differently-formed 
pro- and mesosternum sufficiently distinguish it. The South-American Pseudorchesia, 
Fairm., possesses some characters in common with Hustrophopsis, but differs from it in 
the much smaller scutellum and other particulars; moreover, no mention is made in the 
description of the broad and ovate shape, characteristic of Eustrophopsis, but not of 
Orchesia, to which genus Pseudorchesia is compared by Fairmaire. Two sets of species 
are indicated in the present genus, one (to which O. 15-maculata and several other 
spotted species belong) with the serial rows of punctures on the elytra obliterated 
(though usually represented by fuscous dots, apparently caused by the punctures being 
present on the under instead of the upper surface, and showing through), and the 
other with the rows of punctures present. The apex of the prosternum is very deeply 
and angularly emarginate in our species and in 0. 15-maculata, but more shallowly so, or 
even subtruncate, in some others from tropical South America. Five species are here 
enumerated from Central America, one of which appears to be very widely distributed. 
Abraded examples have much the appearance of certain Platydema and other Diaperides 
inhabiting the same districts; and, like many of the Diaperides, they are found about 
fungi on decaying trees. 
* The differences between this species and Orchesia are noted by Lacordaire, Gen. Col. v. p. 543, nota 
