682 BYRRHIDZ. 
C. vestitus, being of much shorter and more rounded outline. From the forms 
placed before C. vestitus it can be recognized by the greater development of the 
serial punctuation. 
EUTHRYPTUS, gen. nov. 
Antenne fragiles, haud clavate; articulo secundo elongato, leviter curvato. Prosternum haud sulcatum. 
Corpus setosum. 
I establish this genus for two somewhat discordant species, distinguished from 
Cyphonichus by the fact that the second joint of the antenna is elongate, somewhat 
flattened, and slightly curved, so that the joint is adapted to the curvature of the eye 
when the antenna is retracted. The prosternum is not very elongate, and the head 
appears to be less perfectly retractile than in the normal Limnichine. I think it is 
highly probable that the antenne remain outside the body when the head is retracted, 
and do not enter the cavity of the thorax. The arrangements for packing away 
the legs are as perfect as in the other forms of the subfamily. The two species 
are probably very rare insects. The characters are drawn from each of them, but 
E. trigonalis may be taken as the type when the genus comes to be divided. 
1. Kuthryptus orbiculatus, sp. n. (Tab. XX. fig. 4.) 
Subhemisphericus, nigricans, pube elongata erecta vestitus, antennarum basi pedibusque piceis; sat nitidus, 
elytris seriatim punctatis, punctis externis magnis et profundis. 
Long. 3 millim. 
Hab. GuateMaLa, Las Mercedes (Champion). 
The convex rotund form and the copious erect pubescence make this species very 
distinct from all its known allies. The pubescence is somewhat varied in colour, but 
has, in certain lights, a distinct flavescent or even golden appearance, and is somewhat 
irregularly arranged so as to give a slight variegation of colour, as is so common in 
the Limnichi. ‘The antenne are very fragile, strongly setose, not clavate, but with the 
terminal joint a good deal larger than the penultimate. The punctuation of the thorax 
is very fine, and the surface is shining between the hairs. On the dorsum of the 
elytra the punctuation is obscure, but becomes more definite at the sides, so that 
the external series consist of very large and deep punctures. The punctuation of the 
under surface is strongly marked and deep, but rather fine. ‘Three specimens. 
2. Kuthryptus trigonalis, sp.n. (Tab. XX. fig. 5.) 
Ovalis, sat convexus, nigricans, pube subaurea variegata minus dense vestitus; antennis elongatis, basi picea; 
elytris fortiter et profunde punctatis. 
Long. 3} millim. 
Hab. GUATEMALA, Paraiso (Champion). 
