142 ‘Rev. A. Matthews on Species of Trichopterygide 
also for his liberal donation cf examples of every species, in- 
cluding even those of which but one specimen has yet been 
found. 
In investigating the nomenclature of these insects I have been 
much impeded by the difficulty of obtaiming reference to a paper 
published by Mr. Haldeman in the ‘Journal of the Natural 
History Society of Philadelphia,’ in which he has described six 
American species of this family. After searching in vain for 
this publication m the Library of the British Museum, and in 
other places both in this country and on the Continent, I met 
with it at last, threugh the kind assistance of Dr. Power, in the 
University Library at Cambridge. 
All the species described by Mr. Haldeman appear to be re- 
presented among the captures of Dr. Schaum. But I regret to 
say that his descriptions are so extremely vague that I much 
doubt whether some of the references which I have made are 
really correct. If they are correct, it becomes necessary to alter 
two of Mr. Haldeman’s names, viz. T. rotundata and T. fusci- 
pennis, since the former of these was previously used by M. von 
Motschulsky for another species of the same genus described by 
him in the ‘ Bulletin de la Soc. Imp. de Moscon, in 1845, and 
the latter (7. fuscipennis) by Gillmeister, also in 1845, in Sturm’s 
‘Deutschlands Fauna,’ to designate what he supposed to be a 
variety of 7. atomaria. For the sake of avoiding confusion, I 
have therefore substituted other names for these two species. 
The first I have called 7. glabricollis, as indicative of a specific 
difference ; and to the other I have assigned the name of cursi- 
tans, used by M. Nietner for a species of Trichopteryx taken in 
Ceylon, and described in these ‘ Annals’ for 1856. With this 
description, and also with types received from M. Nietner, 
Dr. Schaum’s insects agree in every particular. The same re- 
mark is equally true with regard to Ptenidiwm macrocephalum, 
another species found by M. Nietner in Ceylon, and also by 
Dr. Schaum in America. Of the remaining four described by 
Mr. Haldeman, 7. discolor and T. aspera appear to be distinct 
and well-marked species; 7. abrupta seems to be identical with 
T. fascicularis, Herbst ; and Ptenidium terminale, according to 
his description, agrees in every point with P. apicale, Erichson. 
Three of the species taken by Dr. Schaum are new and un- 
described, all of them distinct and very interesting, especially 
the one which I have called 7. Schaumz in honour of its captor; 
this insect bears a considerable resemblance to the curious Asta- 
topteryx laticollis of M. Perris in the excessive development of 
its thorax. The other seven approach so closely to Kuropean 
forms already well known, that I have assigned to them the 
names now in use. Although some of these differ slightly from 
