384 HETEROMERA. 
One mutilated example. This species is at once separated from P. longipes by the 
more shining and unicolorous surface, more dilated antenne, less coarsely sculptured 
‘ elytra, &c.; the third joint of the antenne is shorter than in P. longipes. 
With Pseudotocerus we finish the first family, the Tenebrionide, of the series to be 
treated in this volume. During the course of publication a large amount of additional 
material has come to hand. The second Mexican expedition of Herr Hége, made in 
1885-1887, has brought to light a number of new species, or species not hitherto 
known from within the limits of the Central-American fauna. The exploration of the 
Northern Mexican States, more especially of Chihuahua and Durango, has proved still 
further the identity of the Coleopterous fauna of the Southern United States and 
Northern Mexico,—several well-known North-American forms, including two genera 
not hitherto recorded from so far south, viz. Embaphion and Alobates, as well as 
various species of Asida and Elwodes, having been discovered by Herr Hoge. 
These and the numerous new species (which include some very interesting forms of 
Asidine) will be included in the Supplement. 
The genus ELusattus, as anticipated, proves to be more numerous in species in Northern 
Mexico, four only being known at the time of publication. 
The whole of the species of ‘Helopides’ and of the following groups contained in 
Herr Hoége’s collection were received in time to be inserted in their proper places. 
To Mr. Flohr of Mexico, at whose instigation the second expedition of Herr Hoge 
was made, we are also indebted for various interesting Mexican species. 
From the Island of Ruatan, Honduras, a small collection of Coleoptera has been 
sent to us by Mr. Gaumer; and though it contains no new Tenebrionide, it proves the 
existence of various species of Platydema in the island. 
The only other important addition to the Central-American Tenebrionide known to 
me as yet is a large maculated species of Zophobas (closely allied to, if not identical 
with, a South-American form), of which we have received a single example from 
Dr. Staudinger; this insect is from Chiriqui. 
