HENOUS.—MEGETRA. . 369 
are contiguous nearly to the apex, and in some specimens connate throughout. In 
this, as in the other species of the genus, the anterior femora and tibie have a silky- 
pubescent patch on the inner side about the middle, this character being also present 
in some genera of the group Cantharides, e. g. Macrobasis, Epicauta, &c. The males 
of H. cardui have the side-pieces of the meso- and metasternum covered by the 
inflexed portion of the elytra, these pieces being more or less exposed in the female. 
3. Henous mexicanus. (Tab. XVII. fig..6, ¢.) 
Henous mexicanus, Dugés, An. Mus. Michoacano, ii. p. 37 *. 
. Hab. Mexico, Tulancingo (Flohr 1), Misantla (Hoge). 
. Two specimens of ‘this insect were captured by Hoge at Misantla. It differs from 
H. confertus and H. cardui by its smoother and almost glabrous upper surface. The 
elytra are very minutely and sparsely, the head and prothorax more closely and distinctly, 
punctured, Fresh specimens appear to be clothed with a very fine scattered pubescence, 
which is easily abraded. H. mexicanus is nearly allied to H. sublevis.(Horn), from 
California. | 
CYSTEODEMUS. 
Cysteodemus, Leconte, Ann. Lyc. N. York, v. p. 158 (1851) ; Lacordaire, Gen. Col. v. p. 661. 
This remarkable genus contains two species, one of which. inhabits New Mexico, 
Arizona, and Northern Mexico, and the other the Colorado desert. The greatly inflated, 
connate elytra, which completely cover the abdomen, distinguishes it from Megetra. 
1. Cysteodemus wizlizeni. (Tab. XVII. fig. 10.) | 
Cysteodemus wizlizeni, Lec. Ann. Lye. N. York, v. p. 158, nota’; Proc. Ac. Phil. vi. p. 330°; 
Col. of Kansas & Eastern New Mexico, p. 16, t. 2. figg. 10, 10a@°; Arcana Nature, p. 126+; 
Journ. Acad. Phil. (2) iv. p. 38°; Dugés, An. Mus. Michoacano, ii. p. 40°. 
Hab. Norta America, New Mexico!?4, Arizona*®, between Santa Fé and Chi- 
huahua *.—Mexico, Chihuahua (Hoge °), Villa Lerdo in Durango (/ége). 
Found in numbers by Herr Hoge in Northern Mexico during his second expedition. 
MEGETRA. 
Megetra, Leconte, in Thomson’s Arcana Nature, p. 127 (1859) ; Leconte & Horn, Class. Coll. N. 
Am. 2nd edit. p. 416 (1883) ; Dugés, Bull. Soc. Zool. Fr. 1886, p. 580. 
This genus includes two species from the Southern United States and Northern 
Mexico. According to von Harold (Col. Hefte, xiii. p. 105), the genus Pseudomeloe, 
Fairm. & Germain, which contains numerous species from the South-American Andes, 
is synonymous with Megetra; but this is probably incorrect, as Pseudomeloe is particu- 
larly stated to have the two portions of each tarsal claw equal. In Megetra the 
anterior tibize are densely clothed on the inner side with fine silky pubescence. 
BIOL. CENTR.-AMER., Coleopt., Vol. [V. Pt. 2, February 1892. 3 BB 
