XXIII 
the first joint, 3"! considerately more slender, but scarcely longer, 
4h, 5'h and 6" glabrous, the latter about as long as it is broad at 
the extremity, the following joints larger and pubescent, the 
7% about as long as broad, 8‘! shorter and narrower than those 
contiguous to it, 9", 10" and 11‘! transverse. Head short and 
broad, punctuation quite obsolete. Thorax strongly transverse, 
truncate at the base, but very slightly sinuate near the hind 
angles so that these project a little backwards, and would be acute 
but that they are rounded, the sides curved and narrowed in front, 
the surface uniformly covered with a very dense and fine almost 
invisible punctuation. Scutellum small but rather broad, triangular. 
Elytra punctured like the thorax and in addition with some quite 
minute serial punctures, in which are implanted setæ so short 
and minute that they can only be detected by a very careful 
examination. Male characters very slight, consisting of a dense 
pubescence on the unäersurface of the front and middle tarsi. 
This was sent me by M. de Lacerda as N° 28, but without any 
information as to its habits. It is not only of great interest as 
revealing to us the existence in South America of a fauna of blind 
S'ilphidæ, analogous to that found in the mountains and caves of 
Europe and North America, but also as adding to the small number 
of forms of Coleoptera having only three joints in the feet : about 
this latter character there cannot be any doubt as there could not 
well be a beetle of the sizein which the tarsal joints should be 
easier to count. 
AGLYCOPTERA (nov. gen. Æutelidarum). 
Ex affinitate generis Pelidnotæ sed pedibus posterioribus incras- 
satis, metasternoque posterius gibboso. Sutura clypealis omnino 
nulla. Tarsi anteriores elongati, articulis quatuor basalibus latis, 
2° 8° 4°que transversis, articulo 5° elongato, crasso, unguiculo 
interno elongato, minus curvato, unguiculo externo gracili, quam 
interno multo breviore. Pedes posteriores majores, femoribus latis, 
tibiis brevibus, crassis, ad apicem inferne calcaribus duabus brevi- 
bus crassis; tarsis crassis, elongatis, quam tibiis longioribus, arti- 
culo 5° dilatato subtus in medio obtuse dentato-emarginato, ungui- 
culis elongatis propter crassitiem valde inæqualibus, exteriore lato. 
The insect for which this new genus 1s established cannot be at 
present placed in any of the known genera of Aulelidæ, though it 
comes nearer to Pelidnota (which is itself a heterogeneous genus) 
than to any other. The division of Pelidnota to which it is most 
allied, is that formed by ?. cyanilarsis Gory. In this latter insect 
the clypeal suture is distinct, and though the legs are somewhat 
similar in structure to those of Aglycoplera, they are not elongate, 
