CYCLONOTUM. 95 
has a very wide distribution in both hemispheres. The genus must be considered at 
present a composite one. Wollaston separated Dactylosternum for a Madeiran species 
(which has, however, a very wide distribution in other parts of the world); and the 
genus is adopted in the Munich Catalogue. Various species included by Mulsant and 
others in Cyclonotum, and recorded as such in the Munich Catalogue, will, however, 
have to be referred to Dactylosternum if that genus should prove valid, as is probable; 
this is the case with all the species of the genus here enumerated: the genus or sub- 
genus Cyclonotum proper appears, indeed, to be confined to the eastern hemisphere, 
while Dactylosternum has a wide distribution in both hemispheres. From the remarks 
appended to various descriptions it would appear that the species feed on decaying 
vegetable refuse, and are not inhabitants of the waters. 
1. Cyclonotum subdepressum. 
Colostoma subdepressum, Cast. Hist. Nat. ii. p. 58. 
Cyclonotum subdepressum, Mun. Cat. ii. p. 495. 
Hab. Mexico, Oaxaca, Jalapa (Hége); Cordova (Sallé); British Honpuras, Belize 
(Blancaneaux); Guatemata, Las Mercedes 3000 feet, San Isidro 1600 feet, Pantaleon 
1700 feet, Teleman, Chacoj, Panima, and Senahu (Champion); Nicaracua, Chontales 
(Janson); Panama, Bugaba 800-1500 feet, Volcan de Chiriqui (Champion).—ANTILLES, 
Cuba ; Sourn America, Venezuela and Colombia. 
This is apparently a very common beetle in Mexico, as well as in the more southern 
regions of Central America; it varies a good deal in size, but is nearly constant in other 
respects ; the Nicaraguan and Panama individuals, however, have the three or four 
external series of punctures slightly finer and more regular than those from other 
localities. 
2. Cyclonotum dispar. | 
Elliptico-oblongum, parum convexum, nigrum, nitidum, pedibus piceis; antennarum basi testaceo, palpis sordide 
testaceis ; crebre sat fortiter punctatum, in capite punctis majoribus sparsis immixtis ; elytris nullomodo 
striatis, seriebus fere equalibus punctorum. 
Long. 3, lat. 13 lin. 
Hab. Mexico, Guanajuato (Dugés, coll. Sallé). 
Although I have seen only three individuals of this species, I have no doubt it is 
quite distinct from C. subdepressum, to which, however, it is very similar and very 
closely allied. The punctuation of the upper surface is rather coarser and more distant, 
and there are on the head some rather larger punctures mixed with the more numerous 
smaller punctures; this is especially notable on the vertex, and no trace of such an 
inequality of sculpture can be seen in C. subdepressum; besides this, the mentum is 
more rugosely sculptured and the tibie rather broader than they are in the commoner 
species. C’. dispar is still more closely allied to the Californian C. cacti, Lec. ; but the 
