MYRMEDONIA. 201 
This species, though very similar to M. flavicollis and M. fauveli, will be readily 
distinguished by the rather more elongate third joint of the antennz, by the short 
head, and especially by the rather numerous erect sete at the sides of the thorax, 
elytra, and hind body. Only a single individual has been found. 
5. Myrmedonia brevicollis. 
Fusca, pedibus, antennarum et elytrorum basibus abdominisque segmentis secundo tertioque testaceis; capite, 
thorace elytrisque parce subtilius punctulatis, abdomine levigato ; prothorace fortiter transverso. 
Long. 3 millim. 
Hab. Nicaraeua, Chontales (Janson). 
Antenne rather elongate, a little thickened towards the apex, the three basal joints 
pele yellow, the others dark, the terminal joint, however, paler than the preceding, 
obscure red, the penultimate joints transverse. ‘The thorax is nearly twice as broad as 
it is long; it is narrower than the elytra, and distinctly narrowed behind. ‘The elytra 
are short, but a good deal longer than the thorax, of a fuscous colour, largely pale at 
the shoulder, very feebly punctate. The basal segments of the hind body are yellow, 
the others being nearly black. Legs entirely pale yellow. 
This species has quite the appearance of a species of Homalota. The mesosternum 
is scarcely at all produced backwards; but its termination is difficult to perceive, owing 
to its raised margin being extremely obsolete; the broad intercoxal isthmus is rather 
shorter than it is in I. fawveli, owing to the metasternal process being rather more 
prolonged in front. The insect appears to a certain extent intermediate between 
M. fauveli and its allies and the following species. Ihave seen only a single example. 
6. Myrmedonia diluta. 
Testacea, nitidula, parce subtilius punctulata, elytris abdomineque versus apicem subinfuscatis; capite thorace- 
que fortiter transversis. 
Long. 4 millim. 
Hab. Mexico, Jalapa (f6ge). 
Antenne elongate, distinctly thickened towards the apex, not very compact, rather 
strongly setigerous, second and third joints subequal, tenth transverse; terminal joint 
large, fully as large as the two preceding together. Head short and broad, quite 
sparingly punctate. Thorax strongly transverse, but a little narrower than the elytra, 
a little narrowed behind, sparingly and feebly punctulate; elytra a little longer than 
the thorax, of a pale yellowish-brown colour, with a large indefinite paler mark at the 
shoulder, feebly punctulate. Hind body impunctate, the basal segments yellow, the 
others brownish. Legs clear yellow. 
The species is allied to the following rather than to those previously described, the 
metasternum being greatly produced between the middle cox, so as to leave only a_ 
short broad isthmus between itself and the broadly rounded, scarcely produced middle 
BIOL. CENTR.-AMER., Coleopt., Vol. I. Pt. 2, Judy 1888. 2 DD 
