ENTOMOLOGICAL INTELLIGENCE. 95 
wings of a different type, so that the Erotylide cannot be associated 
with them. Of the habits and metamorphosis of these insects, but 
littie is known. The larva of AXgithus Surinamensis, described by 
M. Lacordaire, and that of Triplax russica, figured by me,* being 
the only species hitherto noticed in their early states. The perfect 
insects reside in boleti, where they undergo their transformations ; 
and, although sometimes found on the trunks of trees, they are 
never met with beneath the bark. 
The geographical distribution of these insects is peculiar. Of 
the 570 species, only 65 are natives of the Old World; 505 
inhabiting the New,World. Can it be doubted, that the immense 
forests of South America, teeming, as they must do, with the 
vegetable productions which are the natural element of these 
insects, are the primary cause of this vast difference? Only three 
of these insects are, in fact, found in Asia; 28 inhabit Java; and 
only two have been received from New Holland (both belonging to 
the genus Episcapha). Sixteen species have occurred in Africa, 
and thirteen in Europe. The New World species are thus distri- 
buted :—Brazil, 150 species; Guiana, 130; Bolivia, 37; Columbia, 
128; Mexico, 34; the United States, 15; the Antilles, 7. 
After detailing the reasons which have led the author to unite 
Krotylus with insects heretofore placed with Engis, he reviews the 
recent arrangements which have been proposed, especially in this 
country, for a breaking up of the Latreillian group of Xylophaga, 
and the proposal of the section Rypophaga; and concludes that 
the Erotyliens ought to be ‘“ tout-a-fait s¢éparées des Chrysoméliens 
avec qui elle n’a que des analogies trés éloignées, et que sa place est 
dans la section des Rypophaga de MM. Stephens et Westwood” + 
(probably next Engis or Seaphidium). 
The family is divided into two tribes—First, the Engidiformes, 
consisting of 14 genera, including Triplatoma, Dacne, Triplax, Tri- 
toma, &e.; and secondly, the Genuini, also consisting of 14 genera. 
All these, with their species, are then carefully described ; and at 
the end of the volume is a “ Concordance Synonymique,” in which 
each of the species described by the chief previous writers on the 
group is given, with the name and reference by which it is described 
in the present monograph. This is a very useful addition: it is 
* Introduct. to Mod. Class. of Insects, t.1, p. 393, fig. 49—6. 
t+ Inmy Modern Classification of Insects, I suggested that “ the Erotylidx ought perkaps to 
be regarded as more strictly Necrophagous 5 in which case, the Endomychide would, I appre- 
hend, be equally liable to removal” (Vol. i., p. 391). 
