364 -HETEROMERA. 
the first joint of the hind tarsi elongate, as long as the other joints united, moderately stout, the second 
and third joints very short ; wings slightly smoky, the costa piceous. 
Length 63 millim. 
Hab. Mexico, Ventanas in Durango (Forrer). 
One female specimen. In this species the vertex is without distinct tubercle or 
elevation in the middle, and is hollowed out on its anterior side; the thorax has the 
posterior half of the disc flattened, this flattened part being limited on either side ante- 
riorly by an oblique, slightly raised, smooth space. 
Fam. MELOIDA. 
Two Monographs of the Mexican species of this family have been published by 
Dr. E. Dugés:—(1) La Naturaleza, i. pp. 100 et seg. (1870); (2) An. Mus. Michoacano, 
li, p. 34 et seg. (1889). 
Subfam. MELOINA. 
The subfamily Meloine is represented within our limits by ten species, belonging to 
four genera. Cysteodemus is one of the most remarkable forms of Meloide, and, like 
Henous and Megetra, is peculiar to the American continent, 
MELOE. 
Meloe, Linnzus, Syst. Nat. 10th edit. p. 419 (1758) & 12th edit. i. 2, p. 679, 
Proscarabeus, Stephens, Ill. Brit. Ent., Mand. v. p. 65 (1832). 
Cnestocera, Thomson, Skand. Col. vi. p. 342 (1864). 
Treiodous, Dugés, La Naturaleza, i. p. 102 (1870) ; Bull. Soc. Zool. Fr. 1886, p. 580; An, Mus. 
Michoacano, ii. p. 35 (1889). 
Four species of this genus occur within our limits; one only appears to have been 
known to Dugés from Mexico, whence three are now recorded. America north of 
Mexico contains fourteen representatives, the species becoming more numerous north- 
wards. Meloe is a characteristic genus of the temperate zone, and in Mexico and 
Central America its members are confined to the elevated regions of the interior. It 
apparently does not extend south of Costa Rica, as we have not a single representative 
of the genus from the State of Panama; the South-American forms probably all 
belong to Pseudomeloe, Fairm. & Germain. WM. levis, Leach (=cordillere, Chevr., 
and barranci, Dugés), has the mandibles tridentate within, and it forms the type of the 
genus Treiodous, Dugés. This character is probably common to many other species 
with simple antenne, ¢.g. of Mulsant’s subgenus Meloe; M. cicatricosus, Leach, 
agrees with MV. Jevis in this respect. As is well known, some of the species of Meloe, 
more particularly those of the If. proscarabeus-group, vary to such an extent that it is 
