SUNIOTRICHUS.—MONISTA. 589 
Hab. Panama, David (Champion). 
Antenne short and slender, pallid yellow, furnished with long black sete. Head 
broad and short, very deeply emarginate behind ; the surface finely and closely asperate- 
punctate, smoother and slightly shining on the middle. Thorax rather strongly 
transverse, the base rounded, the front oblique on each side, truncate in the middle, 
with a coarse not deep punctuation. Elytra much longer than the thorax, shining, 
closely and deeply punctate. 
This species is represented only by one example in a decayed state, but it is very 
distinct ; indeed the front of the thorax is almost sufficiently different in shape to 
warrant the insect being generically separated. 
MONISTA. 
Monista, Sharp, Trans. Ent. Soc. Lond. 1876, p. 271°. 
This genus consists of four or five Neotropical species, in addition to those of our 
region. In my diagnosis of the genus! the fourth joint of the tarsus is erroneously 
said to be “ bilobo-membranaceo ”; this should be corrected to ‘ lobo-membranaceo.” 
This error has been already pointed out by Arribalzaga (cf. Bol. Ac. Arg. vii. p. 285); 
this savant is no doubt correct in pointing out that Sunius troglodytes and S. pusio, Er., 
belong to this genus; on the other hand his suspicions that Styliderus, Motsch., may 
be the same as Monista are, I have no doubt, erroneous. 
1. Monista concolor. (Tab. XV. fig. 11.) 
Ferrugineo-brunnea, antennis articulis 4° ad 9™ nigricantibus; capite prothoraceque dense fortiterque 
punctatis. 
Long. 44 millim. 
Hab. GuateMaua, near the city, Zapote, Coatepeque, Cerro Zunil, San Gerénimo 
(Champion) ; Panama, Volcan de Chiriqui 2000 to 4000 feet (Champion). 
Antenne a little thicker externally, the two or three penultimate joints transverse. 
Head rather narrow, much rounded behind the eyes, so that the vertex is quite narrow ; 
coarsely and closely punctate. Thorax globose, scarcely so long as broad, closely and 
coarsely punctate. Elytra much longer than the thorax, convex, almost impunctate, the 
hind margin only indistinctly flavescent. The male has the terminal ventral segment 
broadly and deeply excised behind. 
This species may be placed at the head of the genus; it is more robust in build than 
any other. Mr. Champion obtained nearly a score of specimens in the vicinity of the City 
of Guatemala, and eight on the Volcan de Chiriqui, but the other localities have each 
yielded only one or two examples. The specimens exhibit some variation in size and 
in the outline of the head and thorax, but I cannot at present distinguish more than one 
species. Our figure represents a typical example from the Volcan de Chiriqui. 
