70 SCYDM ANID. 
17. Eumicrus minutissimus. 
Eumicrus minutissimus, Schauf. Mon. Scydm. p. 77, t. 8. f. 16°. 
Hab. tGuatemaLa, Champerico (Champion).—Amazons !. 
We have received only one example of this minute creature from Guatemala, and though 
it does not differ from Schaufuss’s description it is quite possible it may prove distinct. 
HECOTUS. 
Antenne geniculate, articulo basali longissimo; palpi maxillares perelongati, quadri-articulati, articulo basali 
minutissimo, secundo valde elongato, anterius ante medium processum brevem emittente, articulo tertio 
gracili, elongato, apicem versus crassiore, quarto iterum elongato, praecedenti quali. 
The very curious insects for which this generic name is proposed are extremely 
distinct from all previously described forms, and can only be compared with the Oriental 
genus Clidicus, from which they differ by the very peculiar structure of the maxillary 
palpi, the two genera being, however, nearly allied. As the characters of Clidicus have 
never been fully investigated, it will be desirable to give in detail those of its ally in 
our region. The head is subtransverse, constricted behind so as to form an abrupt 
comparatively narrow neck ; the eyes are small and placed near the anterior part. ‘The 
antenne are widely separated, inserted on the front of the head close to the eyes, and 
not clavate; they have eleven joints, and are strongly geniculate, the geniculation 
permitting the joints beyond it to be turned outwards and backwards, the basal joint 
being very elongate. The labrum is broad and short, emarginate, with prominent 
lateral angles, and bidentate in the middle. The mandibles are short, with slender 
curvate extremity and a long sharp tooth before this. ‘The upper lobe of the maxilla 
is rather large, oblong, but rather broader at the extremity, the latter bearing long 
dense pubescence. The first joint of the maxillary palpus is small, and closely con- 
nected with its support; the second joint is extremely elongate, its basal portion 
curvate, and beyond the curve there projects forwards a rather long process slightly 
furcate at its extremity, the latter bearing two long sete; the third joint is slender and 
elongate ; the fourth joint also slender and long. ‘The labium is exposed; the ligula 
becoming broader towards the extremity and here emarginate; the labial palpi are very 
small, widely separated, the first and second joints short and stout, the terminal joint 
excessively minute, subulate. The prosternum is large; the front cox cylindric, 
exserted, perpendicular, rather long, contiguous, the prosternal epimera not at all 
prolonged behind them. The middle coxe are subglobular, moderately large, with an 
external prolongation exposing the trochantin; they are nearly contiguous, and the 
mesosternum in front of them bears a moderately elevated carina. The metasternum 
is moderately long. The hind coxe are globular, rather widely separated, the space 
separating them being rather wider than the interval between each coxa and the edge 
