198 ' S§TAPHYLINIDZ. 
to have been found together ; at least I suppose so from the way in which the specimens 
were mixed together when the collections came to me. 
2. Thamiarza cognata. 
Variegata, capite thoraceque fusco-zneis, parce punctatis, nitidis ; elytris fuscis, humeris testaceis, crebre punc- 
tatis; abdomine nigro, basi testacea nigro-maculata, fere impunctato ; antennis obscuris, basi cum pedibus 
testaceis, articulo ultimo perelongato. 
Long. 4 millim. 
Hab. Guatemata, Cerro Zunil 4000 to 5000 feet (Chanvpion). 
Head and thorax of an obscure reddish colour, tinged with eneous; apex of hind 
body pitchy, not abruptly paler than the preceding segments; apex of seventh ventral 
plate in the middle broadly truncate and quite straight; on each side of this it is cut 
away, and at the outer angle is a stout tooth projecting slightly further back than the 
middle part. In other respects very similar to 7. salvini. 
Although very similar to 7’. salvini, this species is undoubtedly distinct; for, in 
addition to the characters above mentioned, there are some differences in the structure 
of the breast, the mesosternal process being not quite so elongate, so that it is separated 
by a greater space from the produced apex of the metasternum. Only one specimen 
has been found. 
3. Thamiarea variegata. 
Rufo-testacea, capite et abdomine late ante apicem nigricantibus, hoc basi nigro-maculata; antennis fuscis, 
basi cum pedibus testaceis ; elytris extrorsum fuscescentibus ; thorace transverso, fere impunctato ; antennis 
sat elongatis, articulo ultimo perelongato. 
Long. 33 millim. 
Hab. GuateMALA, San Gerdnimo (Champion). 
Antenne with the fifth joint about as long as broad, the following joints transverse, 
the terminal joint as long as the three preceding together. ‘Thorax strongly transverse, 
of areddish colour. Elytra closely punctate, testaceous, broadly infuscate externally. 
Hind body almost impunctate. 
This insect is apparently closely allied to 7. salvini, but is smaller, with less elongate 
antenne and differently coloured thorax. ‘The unique specimen is in such a condition 
that it is not advisable to unmount it to ascertain if the structural characters beneath 
are quite the same as in 7. salvini. 
MYRMEDONIA. 
Myrmedonia, Erichson, Kaf. Mark-Brand. i. p. 286; Gen. et Sp. Staph. p. 35. 
This genus, as at present accepted, is a polymorphic one. It was established by 
Erichson on characters drawn chiefly from the parts of the mouth ; and he assigned to 
it, only with hesitation, the majority of the South-American species known to him. 
