156 | HEMIPTERA-HETEROPTERA. 
| | Subfam. ALY DINE. 
Alydide, Dallas, List Hem. ii. p. 467 (1852). 
Alydida, Stal, Ofv. Vet.-Ak. Forh. 1867, pp. 535 & 542. 
Alydina, Stal, En. Hem. iii. pp. 34, 84 (1878). 
This subfamily is but poorly represented in the Neotropical and Nearctic Regions 
compared with the total number of genera and species enumerated. 
| Division ALYDARIA. 
Alydina, Stal, En. Hem. i. p. 209 (1870). 
Alydaria, Stal, En. Hem. iii. pp. 85, 89 (1878). 
The American Alydaria, as at present known, comprise about one fourth of the 
whole number of genera and probably about one half the number of species which are 
included in this subfamily. Of four genera three are Neotropical and one Nearctic; of 
the former, two are found in Central America. 
These are the Alydida propria of Stal (Ofv. Vet.-Ak. Forh. 1867, p- 542), which he 
separates by the “ Femoribus posticis subtus serie spinarum armatis.” 
HYALYMENUS. 
Hyalymenus, Amyot & Serville, Hist. des Hém. p. 224 (1848) ; Stal, Ofv. Vet.-Ak. Forh. 1867, 
p. 542; En. Hem. iii. p. 90 (1878). 
Tivarbus, Stal, Ofv. Vet.-Akad. Forh. 1859, p. 458. 
This genus is easily separated from the following and only other genus of the 
Alydaria here enumerated by the posterior tibie having the apices produced into 
distinct spines. 
Hyalymenus is divided into two sections by the corium being either pellucid or sub- 
opaque; and it is only of this second division that we have as yet received examples 
from Central America. The majority of the species are Neotropical. 
1. Hyalymenus pulcher. (Tab. XV. fig. 8.) 
Hyalymenus pulcher, Stal, En. Hem. i. p. 211. 9°. 
Hab. Honpvuras 1. 
A typical specimen in the Stockholm Museum is here figured. This species can 
always be distinguished from all the varieties of H. tarsatus by the marginal ventral 
spines. | 
2. Hyalymenus tarsatus. 
Alydus tarsatus, Fab. Syst. Rhynch. p. 250. 9. 
- Alydus diversipes, Hope, Cat. Hem. ii. p. 19°; Dall. List Hem. ii. p. 477. 247, 
