184 [August, 



Discocerina (Clasiopa) nigrina, Meig., is now considered a synonym of 

 ohscurella, Fin., and nigrina, Stenh., Sec, a synonym of calceata, Meig. 



*Discocerina {Clasiopa) xanthocera, Lw. — I have taken this species at 

 Tuddenham and Aldebvirgh (Suffolk), in September, and Dr. Wood has found 

 it in Herefordshire. It is a dull grey insect with whitish wings and yellow 

 antennce ; the Ijristles on the face are arranged in two rows. 



*Discocerina [Clasiopa) glaucella, Stenh., may be recognised by noticing 

 the very deep jowls and wide cheeks, the black antennte, the spiirred hind 

 tibia?, and the presence of an extra bristle each side of the face outside the 

 upper pair. Dr. Wood finds it in the Monnow Valley (Herefordshire) in July. 



HYDRELLIN.li. 

 The genera Mosillus {Gymnopa) and Atissa are now included among the 

 Notiphilinse 



*Hydrellia grisea, Stenh. — If I am correct in my interpretation of this 

 species, it may be known from any other by the absence of the minute serration 

 beneath the front femora towards their end. 



Hydrellia laticeps, Stenh., and discolor, Stenh. — I retain Stenhammer's 

 names for these species, as I fail to see the necessity or utility of reviving (on 

 the sole evidence of doubtful type specimens) old iinrecognised names of 

 Meigen. 



*Hydrellia mutata, Zett. — I have seen specimens of this species from 

 Herefordshire and Suffolk. It is a fair sized very dull dark species, the sides 

 of frons and the antenniB being deep dull black ; the latter, however, slightly 

 pale at the base in the male, and the basal joint of the tarsi pale. 



*Hydrellia flavicornis, Fin., is a fairly large species, antennae almost 

 entirely jjale in the male, darkened in female, palpi brownish-yellow ( J ), dai-k 

 brown ( ? ), frons imiformly greyish, face yellow. Most of the specimens I 

 have seen were taken in Herefordshire from May to Jiily, but Col. Yerbury 

 found it at Porthcawl (Glamorgan) in June, 1903. 



*Hydrellia argyrogenis, Becker, may be easily recognised by its black palpi 

 and antennae, dixll thorax, and large jowls which, Avith the face and pleurae, are 

 silvery white. This was a common species in August, 1905, on the water lily 

 leaves growing in an artificial pond at the liottom of Mr. Verrall's garden at 

 Newmarket (Sixffolk). 



*Hydrellia maculiventris, Becker. — This occurred in the same locality as the 

 last species ; it has pale front coxa;, silvery white face, black antennae, legs 

 with knees, tips of tibiae and base of tarsi yellow, and abdomen distinctly grey 

 at the sides. 



Hydrellia hydrocotyles, Hal., I do not recognise, unless it could have been 

 described from a female discolor. 



Hydrellia cochlearim, Hal., and tarsata, Hal. — At present I fail to satis- 

 factorily recognise. 



Philhygria interstincta. Fin. — Our British specimens woidd answer better 



