ACTOBIUS. 461 
behind that the terminal half may be said to be impunctate. The dilatation of the 
male front tarsi is but slight, and there is only a small notch on the last ventral plate. 
A good series of examples has been obtained. 
9. Actobius politus. 
Angustus, parce punctatus et pubescens, nitidulus, fusco-rufus; capite elytrisque nigricantibus, his margine 
apicali pedibusque pallide testaceis; abdomine apicem versus nigricante, antennarum basi testacea. 
Long. 33 millim. 
Hab. Mexico (fohr). 
This little insect is closely allied to A. nitidulus, and like it has the punctuation of 
the head, thorax, and elytra much reduced, there being only a few punctures on each ; 
it is, however, readily distinguished by the more pallid coloration, in which respect it 
more resembles A. mixtus. ‘The single example received is also smaller than any 
specimen of A. nitidulus; it is I believe a female. 
10. Actobius delicatulus. (Tab. XII. fig. 7.) 
Angustulus, nitidus, minus parallelus, rufus; capite nigro, elytris nigricantibus, margine apicali pedibusque 
testaceis; abdomine apicem versus fusco-cingulato, pectore infuscato; antennis sordide testaceis, basi 
diluta ; capite thoraceque crebre minus fortiter, elytris parce obsoleteque, punctatis. 
Long. 43 millim. 
Hab. Guatemaua, Pantaleon 1700 feet, Paso Antonio 400 feet (Champion). 
This species is very distinct from any of the others described here ; it is of narrow, slender 
form, the penultimate joint of the antenne about as long as broad, the head rather narrow, 
and the punctuation on it as well as on the thorax neither coarse nor close; the elytral 
punctuation is obsolete and distant, but the pubescence is quite distinct, and the hind 
margin is broadly yellow. The hind body is a little narrowed near the base; it is of a 
rather dusky red colour, the terminal and penultimate segments more or less definitely 
marked with fuscous, the colour between these two patches being yellow rather than 
red. The tarsi are rather elongate. 
The male front tarsi are but little dilated, and the notch on the last ventral plate is 
but small. 
Three examples were found at Pantaleon and four at Paso Antonio. 
11. Actobius alternans. (Tab. XII. fig. 8.) 
Parallelus, minus nitidus, rufo-testaceus ; capite, elytris, pectore abdominisque apice, nigris; antennis sordide 
testaceis, basi diluta ; capite thoraceque crebre fortiter, elytris dense subtiliter, punctatis. 
Long. 5-6 millim. 
Hab. GuateMata, San Gerénimo, Torola, Paso Antonio (Champion). 
Antenne stout, not elongate, penultimate joints distinctly transverse. Head quadrate, 
coarsely and rather closely punctate, with a space along the middle smooth. Thoracic 
