62 Ins. 
COLEOPTERA. 
Georyssidce ; antennas four-jointed, last joint very large, truncated at the 
tip, and pubescent ; tarsi moderately long, rigid, uniarticulate, and termi- 
nating in a single claw. To include Cyathocerus , g. n., Sharp, l. c. p. 142 ; 
type, C. horni , sp. n., L c. p. 144, pi. iv. figs. 18 & 18 a-c, Guatemala. 
Parnid^. 
Psephenus lecontii, Hald., noticed and figured ; Horn, Tr. Am. Ent. Soc. 
x. pp. 117 & 118, pi. vi. figs. 14 & 15. Habits; Gehring, Canad. Ent. xiv. 
pp. 72 & 73. 
Lara amara, Lee., noticed and figured; Horn, l. c. p. 118, pi. vi. 
fig. 16. 
Lureynia latreillii , Bedel (= cenea , Er., nec Mull., which = maugeti , 
Latr.), Variation discussed ; L. hirschi , Mull., is one variety, and 
similis , Mull., is probably another ; Flach, Deutsche E. Z. xxvi. pp. 252 
& 253. 
New genera and species : — 
Byrrhomorphus , Sharp, Biol. Centr. Am. Col. i. (2) p. 125. Belongs to 
the Potamophilini ; intermediate between the Parnidce and the Byrrhidce ; 
type, B. vestitus , sp. n., 1. c. p. 126, Panama. 
Elmoparnus , id. 1. c. p. 125. Allied to Pamns , but resembles Elmis in 
appearance ; head densely covered with tom en turn. Type, E. brevicornis, 
sp. n., ibid., Panama. 
Disersus , id. 1. c. p. 127. Allied to Potamophilus ; front and middle 
cox® widely separated ; anterior femora long ; impression on the meso- 
sternum broad, definite, and narrow behind. To include P. goudoti , 
Gudr., and D. longipcnnis , sp. n., 1. c. pi. iv. fig. 6, Chiriqui. 
Hexanchorus, id. 1. c. p. 127. Intermediate between Potamophilus and 
Phanocerus ; type, H. gracilipes, sp. n., 1. c. p. 128, pi. iv. fig. 7, Mexico. 
Phanocerus , id. 1. c. p. 128. Allied to Potamophilus ; last six joints of 
antennae formed into a thick oval club. Type, P. clavicornis, sp. n., 1. c. 
p. 129, pi. iv. fig. 8, Guatemala. 
Heterelmis , id. 1. c. p. 130. Allied to Elmis ; types, H. obscurus , p. 130, 
obesus , pi. iv. fig. 10, and simplex , p. 151, spp. nn., Guatemala. 
Elsianus , id. 1. c. p. 131. Allied to last; types, E. robustus , pi. iv. 
fig. 11, striatus, Guatemala, p. 132, and graniger, Costa Rica, p. 133 : 
spp. nn. 
Potamophilus antennatus , Dohrn, S. E. Z. xliii. p. 251, Guinea. 
Pelonomus palpalis , Sharp, Biol. Centr. Am. Col. i. (2) p. 122, 
Panama. 
j Parnus pusillus , Guatemala, Nicaragua, Panama, p. 123, mexicanus , 
* Mexico, punctipcnnisy G uatemala, Panama, and detritus , Chiriqui, p. 124, 
id. 1. c. 
Dryops puncticollis, Mexico, and elmoides , pi. iv. fig. 5, Guatemala, id. 
1. c. p. 121. 
Elmis championiy fig. 12, Chiriqui, p. 134, sculp tipennis, lieterocerus , 
