IfiS7.] Ill 



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 

 [ 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) Ochreons 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-mai'giual 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 Amalopis 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 North 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. tipidina, 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 Tricyphona ; A. immaculata is common, though my uotes 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 



