COLEOPTERA. 
423 
I. Body more or less depressed. 
A. Wings wanting Platynus (Bon.). 
B. Wings well-developed. 
* Posterior angles of thorax distinct. 
a. Thorax widely margined. 
1. Elytra not very convex, broad, more or less ovate, with pro- 
minent shoulders Limodromus (Esch.). 
2. Elytra elongate, narrow, nearly parallel. 
Batenus (Motsch.) 
QivenSf Gy 11.). 
b. Thorax narrowly margined ; elytra widened^ parallel. 
Anchodemus (Motsch.) 
(cyaneusj Dej.). 
t Posterior angles of thorax rounded. 
a. Upper surface opaque Dolichodes (Motsch.). 
b. Upper surface shining. 
1. Joint 3 of antennae pubescent. .... * EurophUm (Chaud.). 
2. Joint 3 of antennae not pubescent . . Agonothorax (Motsch.) , 
{jpunctatuS) Linn.). 
II. Body more or less convex. 
A. Thorax nearly tound ...... . i t ...« ^ ; Agonocyrthes (Motsch.). 
B. Thorax nearly square Tanystola (Motsch.) 
(striata j Esch.). 
0. Thorax heart-shaped Anchommm (Bon.). 
Trigonomina, g, n., Motschulsky, 1. c. p. 349. Allied to Trigonotoma j la- 
brum not emarginate ; joint 1 of antennae scarcely longer than 3 ,* posterior 
angles of thorax obtuse. Sp. T. poUtocollis, sp. n., Motsch. from North India. 
Distrigodes, g. n., Motschulsky, 1. c. p. 363. Allied to Distrigus ; prothorax 
strongly cordiform ) last joint of palpi acuminate j mentum without a tooth. 
Sp. JD.Jlavoguttatus and/emom?es, sp. n., Motsch. 1. c. p. 364, from the East 
Indies ; Z>. bipunctatus, Motsch. 1. c. p. 366, from Ceylon. 
TrichotaruSf g. n., Motschulsky, 1. c. p. S27 = Orthotrichus (Peyr.). Type 
Anchomenus cymindoides (Dej.). 
Tcsdloistus, g. n., Motschulsky, 1. c. p. 347. Allied to Pmcilus ; thorax with 
a simple impression on each side at the base ; subscutellar stria between the 
suture and the first stria. Type P. quadricolor (Fab.). New sp. ; P. pro- 
lo7igatuSf Motsch. t. c. p. 347, ^om the Senegal ; P. Icsvicollisj gtah'icollis, and 
dilatatuSy Motsch. 1. c. p. 348, from the East Indies. 
Pristosia, g. h., Motschulsky, 1. c. p. 311. Allied to Calathm\ form con- 
vex ; prothorax nearly square ; elytra with a row of large punctures on the 
eighth stria ; head triangular j mentum with a simple tooth. Sp. P. piceay 
sp. n., Motsch. 1. c. p. 312, from the East Indies. 
Olisares, g. n.^ Motschulsky, l.c. p. 326. Allied to Olisthopm] prothorax 
convex, scarcely margined, with a rounded impression on each side at base j 
elytra rather convex, deeply striate, scutellar stria distinct ; last joint of palpi 
nearly cylindrical, attenuated at apeX. Sp. 0. picipeSj sp. n., Motsch. 1. c. 
p. 326, from Caraccas ; O.JlavolimhatuSy Motsch. 1. c. p. 327, from Mobile. 
Omia^tusy g. n., Motschulsky, I, c. p. 306, Allied to Colpodes j short,' oval. 
