1878. ] 583 [ Horn. 
Tribe V. PYCNOMERINI. 
Antenne capitate, retractile, inserted under a moderate frontal margin. 
Head horizontal, eyes rounded, coarsely granulated, feebly prominent. An- 
terior coxee rounded, rather widely separated, closed behind. Middle coxee 
distant. Posterior coxze small, oval, very distant. Metasternal side pieces 
narrow. Abdominal segments sub-equal. 'Trochanters of all the femora 
free. Anterior tibize slightly dilated at tip, and with two unequal spurs. 
Tarsi moderate, first joint longer than either of the two following, the third 
longer than the fourth. 
This tribe connects naturally with the preceding through 
Oxylemus, but the affinities are very slight. 
Two genera are known, both from the Atlantic region. 
Antenne 14-joimted, club 2-jointed.. 226... se. ss cece eens Penthelispa. 
AntennweelO-;oumbeds club Solids etalerlvets elses stellt eicia'=letelate Pycnomerus. 
PENTHELISPA Pasc. 
Endectus Lec. Class, Col. N. A. p. 91. 
Antenne eleven-jointed, terminated by a two-jointed club, inserted under 
a slight frontal margin, and without antennal grooves. Gula with a lateral 
ridge extending backward beneath the eyes, which are round and moder- 
ately prominent. Anterior tibiz with outer apical angle prolonged, armed 
at tip with two spurs, the anterior longer and curved, middle and posterior 
dilated feebly at tip, and with two short terminal spurs. Trochanters dis- 
tinct on all the legs. Abdominal segments decreasing gradually in length, 
the fifth slightly longer than the fourth and concave. 
The characters of this genus otherwise do not differ much 
from Bothrideres. Mr. Pascoe says that the tibize are termi- 
nated by two or three spurs, which is to say the least a very 
loose expression, as no coleopterous insect ever has three 
spurs normally. 
The principal differences between this genus and Bothri- 
deres are the mode of insertion of the antenne, the absence 
of antennal groove, the presence of trochanters on all the. 
femora, and lastly the structure of the abdomen. The coxe 
are all more approximated than in Bothrideres. 
The following species occur in our fauna: 
Thorax slightly wider than long, not narrowed behind, hind angles promi- 
130 eG cans.6 OIG nS. Lake oa sid go 4 OOD O_o. Doc Uy SOCORRO heematodes. 
