58 Trans. Acad. Sci. of St. Louis. 
Ophiomorphus and Adelobium refer solely to the large 
South African species forming the type of Dolicaon. Dr. 
Sharp describes from South America (Tr. Ent. Soc. Lond., 
1876, p. 247) a small and very aberrant species, under the 
name Dolicaon distans, without however alluding to the 
structure of the terminal joint of the maxillary palpi, so that 
I cannot confirm the generic reference. The probabilities are 
that it is not one of the Dolicaones as here restricted. 
PAEDERI. 
In this unusually isolated subtribe the labrum loses a 
good deal of the value that it has elsewhere, and, although 
always rather short and broadly truncate, with a small median 
notch or sinus somewhat as in the Lathrobia, this emargin- 
ation may be rather wide and shallow, evenly rounded and 
without flanking teeth as in the European fuscipes — judging 
from a specimen so named for me by Mr. Reitter, — or an 
abruptly formed semicircle, with a short broad obtuse tooth 
at each side, as in femoralis, or a true triangle with straight 
sides, with short lobe-like teeth adjoining, as in riparius, in 
all the cases mentioned being entirely devoid of a denticle at 
the bottom of the emargination. Or, the emargination may 
be deep, evenly rounded and with a small acute tooth at the 
bottom, with the apical margin adjoining only broadly and 
arcuately lobed, as in léttoreus. Most of these cases refer to 
Paederus.proper. In Paederidus Rey, probably throughout 
the genus, the median emargination has a more or less evident 
triangular tooth at the bottom, this being homologous with 
the median tooth in the Lithochares. 
In general structure, especially in the form of the pro- 
sternum, labrum and strongly dilated anterior tarsi, the 
Paederi display more affinity with the Lathrobia than any 
other type of Paederini, and the more or less fortuitous tooth 
at the bottom of the labral emargination, together with the 
prosternal structure and the dilated anterior tarsi, prove 
also a relationship with the Lithochares. It is still more 
evidently related to Lathrobia through Domene,—a genus 
