228 NOTES ON DIPTERA. 



P. comptus. Mas et Fem. Ater, nitens, pedes rufi fusca 

 cincti, alee subfuscce, nervi bene determinati. 



Ater, nitens, laevis : antennae nigrae, capite paullo longiores : thorax 

 fere glaber : abdomen pubescens : pedes rufi ; mesofemora parum 

 incrassata, nonnunquam apice supra fusca ; metafemora apice 

 nigra; protibise fuscee ; metatibiae apice fuscae; tarsi fusci, basi 

 rufi : alee subfuscae ; nervi obscuriores, optime determinati : hal- 

 teres flavi. (Corp. long. lin. f — \\ ; alar. lin. \\ — If.) 



Spring to autumn ; near London ; Hampshire ; Dorset- 

 shire ; Wales ; Isle of Wight ; Cumberland ; Cornwall ; 

 grass in woods. 



P. robustus. Mas. Niger, obscurus, antennw nigro-picew, 

 pedes flavi, tarsi nigro-anmdati, alee limpidce, nervi flavi. 



Niger, obscurus, pubescens : antennae nigro-piceae, capite vix lon- 

 giores : trophi fusci : abdomen basi fuscum : pedes flavi ; meso- 

 femora valde incrassata ; tarsorum articuli apice nigri : alae 

 limpidae ; nervi flavi, non bene determinati : halteres flavi. 

 (Corp. long. lin. 1| ; alar. lin. 1|.) 



Found near London. 



P. mundus. Fem. Ater, parum nitens, antennw nigra?, pedes 

 flavi, meso- et metafemora nigra, alee sublimpidee, nervi bene 



Ater, parum nitens, parce pubescens : antennas nigrae, capite vix 

 longiores : trophi nigri : pedes flavi ; meso- et metafemora nigra ; 

 ungues et pulvilli fulvi : aire sublimpida? ; nervi fusci, tenues, 

 bene determinati ; halteres flavi. (Corp. long. lin. \\ ; alar. lin. 

 11.) 



Found near London. 



Hemerodromia. Hoffmansegg. 



H. obsecratoria. Mas et Fem. Ferruginea, abdomen et tho- 

 racis dorsum fusca antenna? fulvw, pedes flavi, alee sub-fuscw, 

 nervi obscuriores. 



Ferruginea, parum nitens, fere glabra : caput fuscum : oculi nigri : 

 antenna? fulvae, capite longiores : trophi fulvi : abdomen fuscum, 



