ELEOTHINUS.— MECOTETARTUS. | 155 
janctis, penicillo centro-basali, alteris duobus postmedianis (fasciam obliquam simulantibus) solum elevatis, 
ceteris parvis ; antennis cinereis fusco sparsis, articulis apice fuscis ; pedibus fusco annulatis. 
Long. 3 lin. 
Hab. Guatemaa, Capetillo (Champion). 
2. Eleothinus longulus. 
Angustulus, postice gradatim longe attenuatus, fusco-griseus; antennis pallide testaceis griseo maculatis, 
articulis a tertio apice atro-fuscis, scapo quam thorax breviore, infra planato ; thorace sat parvo, antice 
recte angustato, spina laterali brevissima, deinde lateribus sinuato-angustatis ; scutello basi atro-fusco ; 
elytris apice valde oblique recte truncatis, dorso obtuse pluricostatis, penicillis vix elevatis et macula 
magna ante medium laterali atro-fuscis. 
Long. 3 lin. 
Hab. Guatemata, Duefias (Champion). 
In structural characters this species does not differ essentially from Leptostylus 
premorsus from Guadaloupe, which with its allies, differing from the typical forms of 
Leptostylus in the lateral armature of the thorax approaching that of Lezpus, might 
very well be referred to EHleothinus. The small tufts of black hair on the elytra 
resemble the dark spots of certain Leiopi, especially L. variegatus (Haldeman), which 
differs from other Leiopi in the width of the mesosternum, and in that respect approaches 
Eleothinus. 
3. Eleothinus comus. 
Elongato-ovatus, fulvo-testaceus, capite, thorace medio elytrisque plaga magna communi mediana postice 
oblique definita atro-fuscis ; antennis fuscis, articulis basi et annulo mediano flavo-testaceis ; thorace spina 
valida laterali sat ante basin, antice subrecte angustato, pone spinam profunde sinuatim angustato, dorso 
ineequali grosse sparsim punctato, basi transverse depresso ; elytris oblique truncatis, dorso crebre pun- 
ctatis, nigro-penicillatis et setis longissimis obsitis epipleuris verticalibus ; tibiis et tarsis fusco annulatis. 
Long. 34 lin. 
Hab. Guatemara, San Gerénimo (Champion). 
The large sooty-black patch of the elytra is very ill defined (and paler) towards the 
base, but sharply limited posteriorly, where its border forms a blackish line obliquely 
directed posteriorly from the epipleura to the suture, leaving a large apical area of the 
same yellowish-ashy colour as the underside of the body. 
MECOTETARTUS. 
Mecotetartus, Bates, Trans. Ent. Soe. 1872, p. 213; Horn, Trans. Amer. Ent. Soc. viii. pp. 118, 
126 (1880). 
Eutessus, Leconte, Smithson. Miscell. Coll. No. 265, pt. ii. (1878), p. 339. 
The following is the only species of this remarkable genus of Acanthocinini at 
present known :— 
x 2 
