1813.] 85 



desid) magnicornis, Ztt., and Coenosia perpnsilla, Mg. ; and the other 

 two he considered to be new and undescribed species. 



I will take the two former first, and give a rough description of 

 each, so that anyone meeting with either may be able to identify his 

 capture. 



Phaonia (Htetodesia) MAGNICORNIS, cJ ? . 



This has the thickly haired eyes and strontfly feathered aristae of a Hyetodesia ; 

 and the featvires most likely to arrest attention are the unusual width of the 

 frons in the male and the size of the antennce. It is a fairly robust species, about 

 the size of semipellucida. The thorax is lig'ht grey, but looks much darker on 

 account of four black stripes, the two central of which are closely approximated ; 

 post-sutni'al dorso-central bristles three in number. Abdomen grey with an 

 indistinct central line and still more indistinct lateral spots, and with a paii- of 

 small ventral flaps in front of the hypopygium. The frons, uniisually wide in 

 the male, is black with pale margins, which bear along their whole length an 

 open row of strong erect bristles ; the antennae are square ended, broad and reach 

 to the mouth edge in the male, but are less characteristic in the female ; palpi 

 black. Wings nearly clear, cross- veins vmclouded, and halteres yellow. All the 

 tibiae yellow, the other joints black, except the tips of the femora which are 

 yellow like the tibite. 



It appears to be widely distributed here, for my captures extend 

 from Devereux Pool in my own neighbourhood to the banks of the 

 Monnow in the extreme south-west of the county. It is, however, 

 undoubtedly rare, only four males and one female having been taken. 

 They have been met with in the early summer months (May and June) 

 and again in August, which seems to j)oint to its being double-brooded. 

 All have been taken close to water or in marshy places. 



CcENOSIA PERPUSILLA, r? ? • 



A medium sized species, with a grey and distinctly spotted abdomen and 

 yelloAv legs:— Thorax a rather muddy grey, unstriped, the shoulders paler. 

 Abdomen grey with three pairs of i-oiuid spots, very distinct in the male, less so 

 in the female. Antennae and palpi black. Legs wholly yellow in the male, but 

 in the female the femora entirely black or with jiist their extreme tips yellow. 



Pokorny places it in his genus or subgenus Centriocera, which he 

 has created for this and some other half-dozen species. It is not, I 

 believe, uncommon on the Black Mountain range in July. There I 

 take it among heather, crowberry, and such like plants, on the broad 

 exposed plateau of the summit. 



Peoomyia dulcamara, sp. n. ((^ $). 



This belongs to the group in which the abdomen is Avholly grey, and to that 

 portion of it having both antennae and palpi black : — Thorax whitish grey. 



