HYDROPHILIDA. 769 
Two examples only have been received of this obscure little Octhebius. It appears to 
be exceedingly closely allied to the S. European 0. parvulus, Rey (not our O. parvulus ; 
Rey’s species must be renamed); but is a little larger, and has the elytra more coarsely 
punctured, so Ido not think proper to record it under the name of the European species. 
The two examples have the sides of the thorax covered with some white substance. 
CYCLONOTUM (p. 94). 
1(4). Cyclonotum abdominale. 
? Spheridium abdominale, Fabr. Ent. Syst. i. p. 791. 
Cyclonotum abdominale, Muls. Ann. Soc. Agr. Lyon, 1844, p. 179°. 
Dactylosternum abdominale, Gemm. & Har. Cat. Col. ii. p. 496°. 
Dactylosternum rousseti, Woll. Ins. Mader. p. 100, t. 3. f. 1+. 
? Celostoma insulare, Cast. Hist. Nat. Ins. Col. ii. p. 59. 
Dactylosternum insulare, Rey, Hist. Nat. Col. Fr., Palp., 2nd edit. p. 307. 
Hab. Mexico, San Juan Bautista and Teapa in Tabasco (Hége).—Brazit 123; 
ANTILLES 7; Maprrra 4; Mapacascar; &c. 
Cyclonotum dispar (p. 95). 
To the Mexican locality given, add :—Tula in Hidalgo, Teapa in Tabasco (Hage). 
4 (a). Cyclonotum externum. 
Rotundato-ovale, convexum, nitidum, nigrum, pedibus piceis, antennarum basi palpisque testaceis, tarsis rufis, 
antennarum clava opaca; supra crebre fere subtiliter punctatum ; elytris seriebus punctorum majorum 
impressis, internis longe ante basin desinentibus, punctis basin versus subtilioribus. 
Long. 41-5 millim. 
Hab. Panama, Bugaba (Champion). 
Closely allied to C. centrale, from which it is distinguished chiefly by the punctures 
of the elytral series being not so large, especially those in front; in respect of the size 
of the punctures it is intermediate between C. centrale and C. tibiale. Sixteen examples. 
6. Cyclonotum posticatum. 
Rotundato-ovale, convexum, nitidum, nigrum, pedibus rufis, antennis, palpis tarsisque testaceis ; prothorace 
levigato; elytris sat crebre, fortiter punctatis, ad apicem stria suturali abbreviata impressa. 
Long. 4 millim. 
Hab. Panama, Bugaba (Champion). 
This insect resembles a Phenonotum rather than a Cyclonotum of the ‘ Dactylosternum 
group’; it may be distinguished from the species of the former genus by the existence 
of a short sutural stria, and from Dactylosternum by the absence of serial punctures. 
The shape of the mesosternal lamina is peculiar, being narrow and linear, but margined 
in front. Six examples, in very decayed condition. 
BIOL. CENTR.-AMER., Coleopt., Vol. I. Pt. 2, October 1887. 5 FF 
