228 NOTES ON DIPTERA. 



P. comptus. Mas et Fem. Ater, nitens, pedes ritfi ftisco 

 cinctt, aid' subfascw, nerti bene determinati. 



Ater, nitens, lasvis : antennae nigrse, capite paullo longiores : thorax 

 fere glaber : abdomen pubescens : pedes rufi ; mesofemora parum 

 incrassata, nonnunquam apice supra fusca ; metaferaora apice 

 nigra; protibise fuscse ; metatibiae apice fuscse; tarsi fusci, basi 

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

 teres flavi. (Corp. long. lin. | — l^ ; alar. lin. l:j — 1|.) 



Spring to autumn ; near London ; Hampshire ; Dorset- 

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

 grass in woods. 



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

 pedes Jiavi, tarsi nigro-annulati, ales limpidw, 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. \\ ; alar. lin. 1|.) 



Found near London. 



P. mundus, Fem. Ater, parum nitens, antenna:; nigrw, pedes 

 flavi, meso- et metafemora nigra, alw sublimpidw, nervi bene 

 determinati. 



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

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

 ungues et pulvilli fulvi : ala^ sublimpidse ; nervi fusci, tenues, 

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



u.) 



Found near London. 



Hemerodromia. Hqffmansegg. 



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

 racis dorsum fusca antennw fuhw, pedes flavi, alw sub-fuscwy 

 nervi obscuriores. 



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

 antennae fulvae, capite longiores : trophi fulvi : abdomen fuscum, 



