38 LONGICORNIA. 
Abundantly distinct from G. donacioides, independently of the colour of the legs and 
antennee, by the less densely punctured and more shining surface of the head and 
thorax, by the less produced sutural angle of the elytral truncature, and by the more 
compact ashy pubescence of the under surface of the body. 
LEPTURA. 
Leptura, Linneus, Syst. Nat. 1. p. 397 (1758). 
A numerous genus, highly characteristic of the faunas of north temperate latitudes 
and alpine zones in both the eastern and western hemispheres. About 170 species have 
been described; but none has hitherto been recorded from the southern hemisphere, 
or from so low a latitude in America as the following Mexican representative :— 
1. Leptura aliena. 
Elongata, precipue elytris longis et parallelis, apice rotundatis; nigra, subtus nitida, supra sericeo-subopaca, . 
dense breviter erecte pilosa; capite alveolato-punctato, genis paullo post oculos subangulatis ibique collo 
subito constricto; antennis filiformibus, subgracilibus; thorace ut in genere Anoplodera subcylindrico, 
postice vix dilatato angulis haud productis, lateribus modice rotundatis, dorso modice sequaliter convexo, 
punctulato; elytris elongatis et subplanatis, subtilissime discrete et eequaliter punctulatis. ; 
Long. 5-7 lin. 
Hab. Mexico, near the capital (FJohr). 
A species distinct from all others by its general form (elongate, parallel-sided) and 
its facies (due to the dull sericeous elytra and their flattened surface). Its affinities 
seem to be in the direction of the genus Anoplodera, not admitted as distinct from 
Leptura by Lacordaire. 
NEOLEPTURA. 
Neoleptura, Thoms. Class. Long. p. 153; Lacord. Gen. Col. viii. p. 450. 
The following is the only described species :— 
1. Neoleptura lecontei. 
Neoleptura lecontei, Thoms. Class. Long. p. 158. 
Hab. Mexico. 
OPHISTOMIS. 
Ophistomis, Thoms. Archiv. Ent. i. p. 319; Lacord. Gen. Col. viii. p. 451. 
According to Lacordaire this genus is restricted to Tropical America; but as its only 
constant distinguishing character rests on the long and narrow rostrum-like prolon- 
gation of the head, and this is exhibited to some extent by species of Strangalia from 
China and Japan, very much importance cannot be attached to this fact of geographical 
distribution. About fifteen species are known from Tropical America. 
1. Ophistomis picticornis. (Tab. IV. fig. 21.) 
Ophistomis picticornis, Bates, Trans. Ent. Soc. 1869, p. 384. 
Hab. Nicaraava, Chontales (Belt, Janson). 
