XANTHOLINUS. A8T 
Hab. Mzxico (Flohr). 
Iam unable to consider the one example before me as a variety of X. fumatus, for 
not only is there a considerable increase in the punctuation of the thorax, but this part 
is also a good deal more elongate, the lateral punctures are also about ten in number ; 
in other respects the differences are quite unimportant. 
16. Xantholinus alticola. 
Angustulus, elongatus, niger, nitidus ; capite utrinque dense fortiter punctato ; prothorace seriebus dorsalibus 
circiter 7-punctatis ; elytris dense subtiliter punctatis, minus nitidis ; pedibus piceis. 
Long. 8 millim. 
Hab. GuatTEMALA, Quiche Mountains 7000 to 9000 feet, Quezaltenango 7800 feet 
(Champion). 
This species is very readily distinguished by the regular, definite, rather close and deep 
punctuation of the wing-cases; there is also a minute strigosity on the head and 
thorax, and the underside of the former is not shining ; the second and third joints of 
the antenne are rather short, and there is only a very indistinct carination of the 
prosternum. 
A considerable series was found, exhibiting but little variation; the punctures of 
the dorsal series (which, as in all the allies, are somewhat irregular) may be either six, 
seven, or eight in number. 
17. Xantholinus humilis. (Tab. XII. fig. 22.) 
Angustus, parallelus, niger, nitidus; pedibus piceis; capite utrinque fortiter punctato; prothorace elongato, 
posterius angustato, seriebus dorsalibus 6- vel 7-punctatis; elytris nitidis, parce punctatis, serie discoidali 
discreta; prosterno subtiliter longitudinaliter carinato. 
Long. 7 millim. 
Hab. Mexico (Flohr), Jacale (Sallé), Jalapa (Hoge); Guaremata, Capetillo, Cerro 
Zunil 4000 to 5000 feet (Champion). 
This species is extremely closely allied to A. fumatus, but is so much smaller and 
narrower that it is clearly a distinct species; the punctuation of the elytra is rather 
more definite, and the series of discoidal punctures along the middle of each is quite 
distinct, and there is generally an additional puncture in the thoracic series; there are 
only six punctures in the lateral curved series. 
18. Xantholinus discretus. 
Angustus, parallelus, niger, nitidus; antennis pedibusque piceis ; capite utrinque sat crebre punctato; pro- 
thorace elongato, seriebus dorsalibus circiter 11-punctatis; elytris nitidis, parce punctatis ; prosterno 
anterius fere ecarinato. 
Long. 8 millim. ; 
Hab. Guatemata, Volcan de Agua between 8500 and 10,500 feet (Champion) ; 
Panama, Volcan de Chiriqui 4000 to 6000 feet (Champion). 
BIOL. CENTR.-AMER., Coleopt., Vol. I. Pt. 2, July 1880. 3 QQ 
