1868.] 205 
Phryganidm. Old specimens are in the British Museum, from Children's collection, 
without locality, and very doubtfully British. The two other European species, 
N. reticulata, Pab., and N. lapponica, Hagen, might bo reasonably supposed to occur 
here ; the former was noted as British by Turton. Clathrata may be immediately 
separated from reticulata, to which it is very closely allied, by all the tibiae being 
yellow, whereas in the latter the posterior pair only are of that colour ; the 
appendices are also different. Lapponica has a somewhat different aspect, is 
larger, and wants the rich orange tint on the wings ; the posterior pair also shew 
little trace of the dark median band present in the other two ; this is indicated by 
Zetterstedt as a Lapland form of reticulata ; vide " Insecta Lapponica," colunan 
1061. All three species are very handaome, and present a striking contrast to the 
plain and common N. ruficrus, from which they cannot be generically separated. 
All fi'equent lakes and deep pools. — R. T\TcLachlan. 
Stenophylax aJpestris, Kolenati ; a Trichopterous insect new to Britain. — Since 
his previous communication Mr. Chappell has sent me a box of Trichoptera for 
names, and in it are three fine specimens of the above-mentioned insect, new to 
this country, and which had only hitherto occurred, so far as I know, in Carniola 
and Austria proper, in mountainous districts. It is very much smaller than any of 
our previously recorded species of Stenophylax. The ground-colour of the anterior 
wings ia grey with whitish markings, viz., a large " fenestrated spot," a spot at the 
base of the 3rd, 4th, 5th, and 6th apical cells, a small one at the arculus, and many 
small indistinct dots most evident in the apical portion. The appendices are recog- 
nisably figured by Brauer in the " Neuroptera Austriaca," figs. 48 and 49. This 
interesting species was taken in Bm'nt Wood, Staffordshire. Mr. Chappell sends 
also a pair of Anaholia ccenosa of Curtis, a rare species. These are from a now 
uncertain locality, but probably from the Manchester district, where Mr. Cooke has 
found it. — R. McLachlan, Forest Hill, London, 18th January, 1868. 
Descriptions of the British species of Frotinides. — Originally intending only to 
make a few observations upon Megarthrus Bellevoyei, it occurred to me that it 
might be useful to some of our readers if I were to describe briefly the other species 
of the genus to which that insect belongs ; and, when commencing to act upon 
that idea, I have thought it still more likely to be of assistance if I were to extend 
my descriptions to the few other members of the Frotinides. This group, of small 
extent, is very well represented in our country ; as we possess all the recorded 
European species with the exception of Megarthrus nitidulus, which, as it is found 
in Germany, I think is not unlikely to occur here. 
As originally characterized by Erichson, the tribe of Froteinini included 
(besides the mostly exotic Glyptoma), in addition to the genera to which it is now 
restricted, Micropeplus, and (with doubt) Pseudopsis. Dr. Kraatz revised it in the 
BerUn Ent. Zeit., vol. i. (pp. 45 — 53), and in the Ins. Deutsch. ii., 1019, gives the 
following characters for it : — Under-side of thorax horny behind the anterior coxee ; 
prothoracic stigmata hidden ; 2nd segment of the abdomen beneath with a longi- 
tudinal ridge-hke elevation in the middle of its base ; anterior coxa3 transverse, 
but little prominent, posterior coxce transverse. The insects composing it are 
