I16 Cees, VES vio NG EL ASyoE Is 
Lobotarsus Schwarz. The genus was erected for species differing from Yylotarsus 
in that the margin of the mesosternal groove is inclined and not angled. Schwarz 
(1903a : 359) himself cast doubt on the value of this character when he drew atten- 
tion to the fact that the appearance of the margin of the mesosternal groove of 
T. angularis Schwarz was intermediate between that found in Tylotarsus and 
Lobotarsus. Fleutiaux clearly had misgivings concerning the genus. In 1935¢ 
he treated Lobitarsus [sic] as a subgenus of Tylotarsus. In 1941 he restored it to 
generic status, redefining it on the basis of the shape of, and presence of tubercles 
on, the prothorax. 
Centrostethus Schwarz was proposed as a new name for Enoploderes Schwarz, 
1898, preoccupied by the Cerambycid genus Enoploderes Faldermann, 1837. The 
type-species cuspidatus Klug is distinguished from A. murinus (Linnaeus) only by 
the lobed tarsi and sharply pointed anterior angles of the prothorax. 
Compsolacon Reitter. The genus is characterized by the crenulate lateral margins 
of the prothorax. This characteristic is known to vary intraspecifically and also 
on the two sides of the same individual. Fleutiaux (1918d : 198) placed the genus 
in synonymy with his interpretation of Lacon (= Agrypnus of the present work). 
Since that time there has been little agreement concerning the status of Compsolacon. 
In the most recent work, that of Van Zwaluwenburg (1966 : 298), Compsolacon 
is reduced to a subgenus of his interpretation of Adelocera Latrielle, which corresponds 
to Agrypnus Eschscholtz of the present work. 
Paralacon Reitter. Reitter erected this genus for his interpretation of Lacon 
cinnamomeus Candéze, which was probably correct. In this species the posterior 
femora are elongate, so that the femoro-tibial articulations are visible from above 
when the beetle is at rest. This characteristic is developed to a greater or less 
degree in a number of species which in all other respects bear a close resemblance 
to one another. 
Neolacon Miwa. The genus was established for three species, formosanus Miwa, 
cervinus Erichson, sinensis Candéze ‘and probably others’ in which the lateral 
carina of the prothorax almost attains the anterior margin. The length of this 
carina, which arises at, or just anterior to the posterior angles of the prothorax, 
has been found to vary considerably both intra-specifically and on the two sides of 
the same individual. Five years after establishing Neolacon, Miwa (1934 : 14) 
placed it in synonymy with Compsolacon (q.v). 
Colaulon Arnett. The genus was erected for those Nearctic species ‘which 
have hitherto been placed in the genus Lacon [auctt. = Agrypnus as defined in 
this work], but which differ from the type-species murinus Linnaeus, in that the 
scaly vestiture is sparse, coarse and not coloured and forms regular rows on the 
elytra and in which the lateral margin of the prothorax is denticulate’. Since 
these characteristics are in my opinion of no value at the generic level (see p. 114), 
and as all the Colaulon species known to me possess the diagnostic characteristics of 
Agrypnus the genus is here treated as a synonym of Agrypnus. 
Cryptolacon Nakane & Kishii. The genus was erected for species differing from 

