EUCONNUS. 47 
EUCONNUS. 
Euconnus, Thomson, Skand. Col. iv. p. 88 (1862); Reitter, Ins. Deutsch. iii. pt. 2, p. 178. 
Scydmenus, Gemminger & Harold, Cat. Col. ii. p. 706 (pars). 
Although Euconnus is not recognized by the authors of the Munich Catalogue as 
distinct from Scydmenus, it appears nevertheless to be a valid genus, distinguished by 
the head being more or less narrowed behind, with the eyes placed near the front, and 
the anterior part abruptly deflexed at a right angle with the vertex, and the antenne 
inserted immediately behind the labrum. The genus is very rich in species, and is 
almost cosmopolitan. As our representatives are numerous, and do not fall satisfactorily 
under the subgenera formed for the European species, I have, to facilitate reference, 
adopted a division that unfortunately is not a good one, as there are a few intermediate 
or doubtful forms; but I have not been able to make a more useful one. 
§ 1. Thorax at the base either bifoveolate or transversely impressed. 
This group comprises a considerable variety of forms: where the thorax is bifoveolate 
the two foveze are usually connected by a nearly obsolete channel; sometimes this 
channel is more developed, and the fovee are merely deeper impressions at its 
extremity; this transverse channel also is frequently more obsolete in the middle, 
and may become almost completely divided into two transverse depressions as in 
Li. difficilis. 
A. Thorax without lateral carinule at the base. 
In many species of this group the sides of the thorax are more sharply deflexed at 
the base, giving rise to a faint appearance of a carinule, but there is really no raised 
line on the angle. 
1. Euconnus bifoveolatus. 
Scydmenus bifoveolatus, Schaut. Mon. (in Nov. Act. Leop.-Carol. Nat. Curios. xxxiii.) p. 65 (1866)'. 
Hab. Muxtco, Teapa 1. 
2. Huconnus chevrolati. 
Scydmenus chevrolati, Schauf. Mon. p. 69, t. 2. f. 8*. 
Hab. Mexico, Yucatan }. 
Some doubt must be expressed as to whether the insects supposed to be the sexes of 
E. chevrolati are really one and the same species. 
3. Euconnus trigeminus. 
Scydmenus trigeminus, Schauf. Mon. p. 37, t. 1. ff. 1, a, 6+. 
Hab. Mexico, Teapa }. 
Possibly allied to L. hirsutus and EL. alticola. 
