HEMIPTERA-HETEROPTERA. 305 
Onalips contains, at present, only two described species, one of which inhabits 
Colombia, including the State of Panama, and the other Western Tropical Africa. 
1. Onalips nigerrimus. 
Aithus nigerrimus, Dall. List Hem. i. p. 112. 1*. 
Onalips nigerrimus, Sign. Ann. Soc. Ent. Fr. sér. 6, i. p. 323, t. 10 (Cydnides, t. 6) £. 437. 
Hab. Panama?, Volcan de Chiriqui, San Lorenzo, Taboga Island (Champion).— 
CotompBia 1, Medellin 2. 
SYLLOBUS (p. 3). 
Syllobus emarginatus (p. 4). 
To the locality given add :—Mexico, Presidio (Forrer). 
One example of this rare species is now in our collection. This is remarkable for 
its small size (long. 8 millim.), but otherwise is not to be differentiated, at least by 
myself, from typical specimens. 
HOMALOPORUS. 
Homaloporus, Uhler, Bull. U. 8S. Geol. & Geogr. Surv. ii. p. 377 (1877) ; Sign. Ann. Soc. Ent. Fr. 
. sér. 6, i. p. 330. 
This genus is both Nearctic and Neotropical in its distribution, and Signoret has 
enumerated three species. 
1. Homaloporus pangziformis. 
Homaloporus pangeiformis, Sign. Ann. Soc. Ent. Fr. sér. 6, i. p. 331, t. 11 (Cydnides, t. 7) f. 487. 
Hab. Mexico}, 
ZETHUS (p. 4). 
This genus, as since defined and described by Signoret, “qui est assez difficile & 
définir ” (cf. Ann. Soc. Ent. Fr. sér. 6, i. p. 423), embraces a large number of species 
(thirty-four), and is represented in both the Eastern and Western hemispheres. 
Signoret has also included in the genus thus two species which I had otherwise 
generically treated: Pangewus impuncticollis (p. 7) and Microporus testudinatus (p. 8). 
2. Aithus rogenhoferi. 
Aithus hogenhoferi (sic), Sign. Ann. Soc. Ent. Fr. sér. 6, i. p. 429, t. 12 (Cydnides, t. 8) f. 587. 
Hab. Mexico}; GUATEMALA? 1 
3. Hithus politus. 
Asthus politus, Sign. Ann. Soc. Ent. Fr. sér. 6, ii. p. 36, t. 2 (Cydnides, t. 10) 1 £.77%. 
Hab. NortH America, California 1.—Nicaragva 1. 
BIOL. CENTER. AMER., Rhynch., August 1889. 39 
