«98 . HYDROPHILIDA. 
1. Phenonotum dubium. . 
Rotundato-ovale, convexum, nigrum, nitidum; antennarum basi, palpis tarsisque testaceis, pedibus piceis, 
’  antennarum clava infuscata; capite thoraceque sat crebre subobsolete punctatis, elytris crebrius sat 
fortiter punctatis. 
Long. 13, lat. 1 lin. 
Hab. Mexico, Cordova, Vera Cruz (Sallé), Oaxaca (Hoge); Guatemaa, San, Gerd- 
nimo, Duefias, Guatemala city, Paso Antonio 400 feet (Champion); Costa Rica, Cache 
(Rogers). 
Although extremely closely allied to the North-American P. estriatum, Say, Lec., I 
cannot consider this insect to be conspecific therewith; the head and thorax are more 
finely, and the elytra slightly more closely and finely punctate. As I have not been 
able to find in the series of specimens from the above various localities a single 
individual agreeing in these respects with the North-American species, I cannot treat 
the two as identical. 
The North-American insect is said to occur also in Brazil; and if it really exists 
there, its occurrence in Central America may be anticipated *. | 
2. Phenonotum apicale. 
Rotundato-ovale, convexum, nigrum, nitidum, prothoracis marginibus picescentibus, elytrorum apice trans- 
versim rufo-signato, subtus piceum; capite, prosterno, elytrorum margine inflexo pedibusque rufis, 
antennarum clava leviter infuscata, basi cum palpis tarsisque testaceis ; capite thoraceque sparsim, hoc 
obsolete, punctatis, elytris crebre sat fortiter punctatis. 
Long. 12, lat. 2 lin. 
Hab. Guaremata, Guatemala city (Champion); Nicaracua, Chontales (Janson). 
Allied to P. dubiwm, but rather smaller, and readily distinguished by the transverse 
patch of bright colour at the extremity of the elytra; the punctuation of the upper 
surface is throughout rather more distant than it is in P. dubcum. 
8. Phenonotum tarsale. (Tab. III. fig. 8.) 
Rotundato-ovale, convexum, nigrum, nitidum, prothoracis marginibus picescentibus, elytrorum margine laterali 
ad apicem rutescente; subtus capite, prosterno, elytrorum margine inflexo pedibusque piceis; antennis, 
palpis tarsisque testaceis, his subtus conspicue hirsutis; capite prothoraceque minus crebre, elytris crebre 
fortiter punctatis. 
Long. 24, lat. 13 lin. 
Hab. Panama (colls. Godman et W. W. Saunders). 
* This may be the best place to notice Calostoma minutum, Cast. Hist. Nat. ii. p. 58, where a description 
occurs, consisting of the following diagnosis and measurements :—“ Long. 1 lig. 3, larg. § lig. Corps ovale, 
convexe, d’un noir un peu brunatre, couvert d’une ponctuation fine mais serrée; elytres non strides; palpes, 
extremité des antennes et tarses bruns. Mexique.” Iam unable to identify any species of the genus Cyclo- 
notum or Pheenonotum with this description, and it may perhaps have been made from a species of another 
genus. I am not aware of any collection in which an example of Castlenau’s species exists. 
