1887J ■ -111 



wide open fork ; the great cross-vein is after the middle of the discal 



cell ; the spurs of the tibiae are minute. It is not at all uncommon, I 



having often caught it in Hampshire, Sussex, Kent, and this summer 



in North "Wales. 



TRICHOCERA. 



The species of "winter gnats" require more minute study from 

 all parts of the world before any decided opinions can be given as to 

 the distinctness of species. As a rule I have only caught them be- 

 tween September 18th and May 8th, but I caught one this year on 

 June 16th at Bettws-y-coed. 



AMALOPIS. 



1 (2) Ochreous large species littoralis, Mg. 



2 (1) Blackish or greyish species. 



3 (4) Large species, with conspicuous marks on the wings occulta, Mg. 



4 (3) Smaller species, with wings entirely without marks. 



5 (6) Second sub-marginal cell much shorter than the first immaculata, Mg. 



6 (5) Second sub-marginal cell only a very little shorter than the first .. 



unicolor, Schum. 



I do not know A. straminea, Mg., except from "Walker's type ; 

 he described from an ochreous AmaJopis, of which I made the following 

 note : " quite distinct from A. littoralis, no cross-vein between upper 

 fork of radial and sub-costal, the upper vein from the discal cell has 

 a slight petiole." I have a note also of a large AmaJopis in the British 

 Museum, labelled transversa, which is distinct from A. occulta, and I 

 believe I have two or three undescribed species in my own collection, 

 one of which was not uncommon in ISTorth "Wales last June. I will, 

 however, leave these for another occasion. 



A. littoralis, Mg. : all the specimens I have seen have the slight 

 cloudings of A. tipulina, Egger, which I am convinced is a synonym. 

 I have seen it abundantly at many places, from Ivybridge to Inveran 

 and Barmouth. 



A. occulta, Mg. : I caught several on August 22nd last at Ivy- 

 bridge, which is the only time I have met with it. 



A. immaculata, Mg. : Osten-Sacken is quite right in sinking the 

 genus TricypJiona ; A. immaculata is common, though my notes only 

 give Sussex, Hants, Suffolk and North "Wales. 



A. unicolor, Schum. : this was common at Eotherfield in Sussex 

 on June 6th, 1886, but unfortunately I did not notice their being 

 distinct from A. immaculata ; however, I took seven, and they are 

 abundantly distinct beyond the characters in the table by their slightly 



