118 HEMIPTERA-HETEROPTERA. 
none of Hope’s species is at all identical with any here referred to, as drawings of 
the same have been forwarded to Oxford, and, by the kind assistance of Mr. F. E. 
Robinson and Prof. Westwood, have been carefully compared with the types in the 
Hopeian collection. I have myself done the same with those described by Dallas and 
Walker. | 
This is a Neotropical genus, which comprises a few Nearctic species. 
1. Acanthocephala latipes. 
Cimezx latipes, Drury, Ins. iti. p. 63, t. 45. £. 3°; Herbst, Gem. Naturg. vi. p. 257. 9, t. 394. f. 3. 
Lygeus compressipes, Fabr. Syst. Rhynch. p. 209. 24. 
Diactor compressipes, Burm. Handb. ii. 1, p. 884. 1; H.-S. Wanz. Ins. iii. p. 93, f. 317”. 
Anisoscelis compressipes, Blanch. Hist. des Ins. p. 122, 1. 
Metopodus latipes, A. & S. Hist. des Hém. p. 193. 1°. 
Metapodius latipes, Dall. List Hem. ii. p. 427. 1°; Stal, Hem. Fabr. i. p. 50. 1. 
Metapodius albicollis, Dall. List Hem. ii. p. 427. 2. 
Stoll, Pun. f. 14. 
Acanthocephala latipes, Stal, En. Hem. i. p. 149. 1°; Berg, Hem. Argent. p. 70. 85°. 
Hab. Panama (coll. Dist.) —Jamaica!; CoLomBia®; Guiana, Surinam ®; Brazin 234°, 
Para®, Pebas (coll. Dist.), Rio Janeiro >; ARGENTINE REPUBLIC ®. 
The Panama specimen here referred to is the form MW. albicollis, Dall. 
2. Acanthocephala declivis. (Tab. XI. fige. 19 & 24 3, 21 2.) 
Rhinuchus declivis, Say, New Harm. Ind. Jan. 1832, p.10; Compl. Writ. i. p. 305. 2. 
Diactor alatus, Burm. Handb. 11. 1, p. 334. 3°. 
Anisoscelis declivis, Say, Compl. Writ. i. p. 827. 4. 
Metapodius thoracicus, Dall. List Hem. ii. p. 428. 37. 
Acanthocephala declivis, Stal, En. Hem. i. p. 150. 2°; Uhler, Bull. U.S. Geol. & Geogr. Surv. ii. 
p. 297*; Town. Glov. Ill. Ins. Ord. Hem. p. 20, t. 7. fig. 24. 
Acanthocephala alata, Stal, En. Hem. i. p. 150. 3°. 
Hab. Norta America, Texas*4, Arizona‘, Florida‘, California+, New Mexico 4.— 
Mexico 45 (coll. Sallé), Vera Cruz®, Oaxaca 1, Yucatan, Valladolid (Gawmer); CenTRaL 
America‘; Honpuras ?, river Sarstoon (Blancaneauz). 
Prof. Uhler remarks :—“ This species varies greatly in size, in the shape and acute- 
ness of the pronotal wings, in the number of spines of the femora, in the width and 
shape of the expansions of the tibie, and in the colour of the antenne. Colossal 
specimens from South Carolina and Florida measure as much as 34 millims. in length. 
In the less mature state the antenne are entirely reddish cinnamomeous. Old speci- 
mens are dark fuscous, powdered beneath with whitish.” These remarks cover almost 
all the peculiarities of the specimens now before me, and seem to explain away the 
only points raised by Stal to separate A. alata from A. declivis, Say— maxime affinis 
