BOLITOBIUS.—MEGACRONUS. 317 
2. Bolitobius obliquus. (Tab. VII. fig. 17.) 
Gracilis, niger, nitidus; antennarum tibiarumque basibus elytrisque testaceis, his plaga scutellari elongata 
maculaque magna versus angulum posteriorem nigris, tarsis sordide testaceis; abdomine versus apicem 
fortiter haud dense punctato, segmento basali levigato. 
Long. 6-8 millim. 
Hab. Muxico, Cerro de Plumas (Hége). 
Antenne slender ; the two basal joints testaceous, the others dark; tenth joint about 
as long as broad. Palpi piceous. Head narrow, like the thorax entirely black. 
Elytra longer than the thorax, yellowish, with a narrow, elongate, triangular sutural 
patch reaching nearly to the apex, and with a large black mark at the outer angle of 
each, with a sutural series of about six punctures, and a discoidal series of also about six 
obsolete punctures, and with a marginal series of about ten punctures close to the 
epipleural margin. The legs are black, but the bases of the tibiee are broadly testaceous 
and the tarsi are sordid yellow. In one individual, supposed to be the male, the 
terminal ventral plate is very slightly flattened at the middle of the extremity, and the 
flat part is set with fine sete. 
Three examples are before me. Hoge also found at Jalapa another species of Boli- 
tobius similar to B. obliquus, but with the terminal joint of the antenne pallid, and 
the dark scutellar patch of the elytra absent; but the example is too immature for 
satisfactory description. 
3. Bolitobius alticola. 
Gracilis, niger; antennarum basi pedibusque testaceis, abdominis segmentorum marginibus posterioribus fuscis ; 
elytris ex parte majore nigris, vitta obliqua testacea ; abdomine parce punctato, segmento basali levigato. 
Long. 6 millim. 
Hab. Guatemata, Totonicapam 8500 to 10500 feet, Quiche Mountains 7000 to 9000 
feet (Champion). 
This insect is closely allied to B. obliquus, but has a narrower head, a more sparingly 
punctured hind body, and a rather shorter metasternum, besides differing in the details 
of colour above mentioned. 
Only one example is present from each locality ; they do not agree very closely: the 
one from the Quiche Mountains is immature. 
MEGACRONUS. 
Megacronus, Stephens, Ill. Brit. Ent. v. p. 171; Fauvel, Faune Gal.-rhen. iii. p. 553. 
Bryoporus, Kraatz, Ins. Deutsch. i. p. 452. 
Much confusion has prevailed about this genus and Bolitobius and Mycetoporus; but 
the union of Bryoporus with the Megacronus division of Bolitobius, while the other two 
genera are treated as distinct, has been proposed by Fauvel, and affords at present a 
