202 STAPHYLINIDA. 
of the mesosternum. In respect of this structure these insects approximate greatly to 
the subgenus Zyras of Rey, from which, however, by their small stature and Homalotoid 
form, they are profoundly different. 
Only a single individual, in bad preservation, of MW. diluta is before me; the lobes 
of the maxille are very elongate, and the maxillary palpi very slender in it. 
7. Myrmedonia laxicornis. 
Pallide fusca, antennis nigris, harum basi, pedibus, elytrorum humeris abdomineque basi testaceis, femoribus 
intermediis et posterioribus extrorsum fuscis; prothorace fortiter transverso, parce subtiliter punctato ; 
elytris quam hic paulo longioribus, vix crebrius punctatis, abdomine supra levigato. 
Long. 3? millim. 
Hab. GuateMAta, San Joaquin in Vera Paz (Champion). 
Antenne rather elongate and stout, third joint slightly longer than the second, tenth 
slightly transverse; terminal joint large, longer than the two preceding together. 
Thorax much broader than long, a little narrower than the elytra, only slightly 
narrowed behind. LElytra a little longer than the thorax, of a brownish or fuscous- 
cinnamon colour, paler at the base externally. Hind body with the two basal segments 
yellow, each marked transversely at the base with dark colour, the other segments 
pitchy. 
In this species the intercoxal process of the metasternum is much produced forwards ; 
it is therefore a little less distant from the mesosternum than it is in VW. fawveli and 
in WM. flavicornis. The appearance is greatly that of the species of Homa/lota. 
8. Myrmedonia fragilis. 
Brunneo-testacea, antennarum basi, pedibus abdomineque testaceis, hoc segmentis 2°-4™ ad basin transversim 
fusco signatis; prothorace transverso, obsolete punctato, basi ante scutellum subimpressa; elytris quam 
_ prothorax longioribus et latioribus, crebre subtilissime punctatis ; abdomine supra levigato. 
Long. 4} millim. 
Hab. Panama, Volcan de Chiriqui 3000 to 6000 feet (Champion). 
Antenne elongate, laxly articulate, third joint a good deal longer than second ; joints 
four to ten each of similar length, but each a little broader than its predecessor, the 
tenth about as long as broad; eleventh elongate, longer than the two preceding 
together. Thorax transverse, distinctly narrowed behind, very indistinctly punctate, 
the hind angles obtuse but not rounded. Elytra longer and broader than the thorax, 
rather closely and very finely punctate. Legs very elongate. 
This is a very Homalotoid species, and in form resembles J. homalotoides, but is 
different in colour. The individuals are apparently considerably larger than those of 
M. laxicornis; and the antenne have the joints rather more elongate. The only two 
individuals I have seen are in extremely decayed condition; one of them has the 
antenne nearly black, and the abdominal segments towards the apex darker; although 
