238 HISTERID ZA. 
from the apex of the elytron, and when near to the base turns towards the suture and 
disappears on the dorsal region by becoming confluent with the elytral strigosities. 
2. Bacanius ignobilis, sp. n. (Tab. VII. fig. 11.) 
Ovalis, convexus, brunneus, nitidus; antennis pedibusque rufis; pronoto ante scutellum fortius punctato ; 
elytris sparse punctatis, punctis subaciculatis, striis obsoletis ; pygidio tenuissime et sparse punctulato; 
prosterno subtriangulari, basi lato, stria integra, antice conjuncta; mesosterno antice semicirculari, stria 
marginali integra, stria postica recta, crenulata; metasterno sparse punctato. Long. 1 millim. 
Hab. Panama, Volcan de Chiriqui 3000 feet (Champion). 
In the form of the prosternum and its stria this insect is unlike any other known 
species. A single example. 
8. Bacanius hamatus, sp. n. (Tab. VII. fig. 12.) 
Ovalis, convexus, rufo-brunneus, nitidus; fronte grosse punctata, subtilissime rugosa ; pronoto sparse punctato ; 
scutello inconspicuo ; elytris punctatis, stria suturali antice abbreviata, medio late hamiformis ; prosterno 
lato, basi sinuato, punctato; mesosterno marginato grosse punctato, antice sinuato ; pygidio sparse punc- 
tulato, apice sublevi; tibiis anticis in medio angulatis. Long. 1} millim. 
Hab. Guatemaa, San Gerénimo (Champion). 
This species may be placed near B. misellus, Lec., but it is as large as B. rhombo- 
phorus, Aubé. The peculiar shape of what may be termed the sutural stria will 
distinguish it from all the described species. The stria commences close to the suture 
at a quarter of the length of the elytra from the base, and at half the length it turns 
abruptly into the middle of the elytron. A single specimen. 
4. Bacanius mexicanus, sp. n. 
Ovalis, convexus, brunneus, nitidus; antennis pedibusque dilutioribus; fronte sublevi; pronoto sparse punc- 
tulato, stria marginali integra, linea punctorum basali transversa; scutello distincto; elytris striis 
obsoletis, disco postice sparse aciculatim punctulato ; pygidio minute strigoso-rugoso ; prosterno modice 
elongato, bistriato, sparse punctulato; mesosterno marginato, stria late interrupta, oblongorum punctorum 
serie transversa a metasterno distincta ; metasterno punctulato. Long. 1 millim. 
Hab. Mexico, Cordova (Sallé). 
The chain-like stria before the scutellum forms in this insect almost a straight line, 
as shown in the figure of Acritus strigosus, Mars. (Monogr. in Ann. Soc. Ent. Fr. 1856, 
t. 14. no. xliii. fig. 19), but towards the outer edges of the thorax it becomes feeble and 
punctate. Unique. 
ACRITUS. 
Acritus, Leconte, Proc. Ac. Phil. vi. p. 288 (1858). 
Aletes, Horn, Proc. Am. Phil. Soc. xii. p. 856 (1878). 
About sixty species of this genus are now described, but very many undetermined as 
yet exist in collections. The genus occurs in both hemispheres, and its species are 
