DRYOMYZA. 163 



vein upright, hardly curved inward, parted by twice its length from 

 the praebrachial transverse, and by half its length from the border. 

 Halteres very pale yellow. Legs testaceous. 

 Generally distributed. (E. S. I.) 



The following additional species of the two preceding genera 

 have been recorded as British : 



1. olens, Meig. 8. fenestralis, Fal. 



2. affinis, Meig. 9. rufiventris, Meig. 



3. prseusta, Meig. 10. inscripta, Meig. 



4. tigrina, Meig. 11. humih's, Meig. 



5. griseola, Meig. 12. fuscipennis, Meig. 



6. suilloides, Desv. 13. ruficornis, Meig. 



7. villosa, Meig. 14. arenaria, Hal. 



Genus IX. HETEROMYZA. 



HETEROMYZA, Fal. Heterom. 2 (1820) ; Meig. ; Mcq. ; Zett. 



Corpus oblongum. Antennarum articulus secundus brevis ; tertius ro- 

 tundus, secundo paullo longior. Alarum vena costalis spinis nullis. 

 Body oblong. Antenna not reaching the epistoma ; second joint 



short ; third round, a little longer than the second ; costal vein armed 



with spines. 



1. flava, Meig. Zw. vi. 46. 2 (1830). Fulva, capite flavo, palpis 

 testaceis apice fuscis, antennis fuscis basi subtusque flavis, alis sublim- 

 pidis, costa apice venaque discali transversa subfuscis, pedibus testaceis. 

 Long. 3 ; alar. 6 lin. 



Tawny. Head yellow. Palpi testaceous, with brown tips. An- 

 tenna tawny ; third joint brown above ; sixth black, very minutely 

 pubescent. Wings nearly limpid, clouded with brown in front, at the 

 tips, and about the discal transverse vein; cubital and praBbrachial 

 veins slightly diverging between the transverse veins, almost parallel 

 from the discal transverse to the border ; discal transverse vein indis- 

 tinctly undulating, almost upright, parted by nearly twice its length 

 from the prsebrachial transverse and from the border. Halteres and 

 legs testaceous. 



Not common. (S.) 



Genus X. DRYOMYZA. 



DRYOMYZA, Fal. Sciom. 16 (1820); Meig.; Mcq.; Zett. Dryope, 

 Desv. 



Corpus elongatum, sublineare, nitens, breve. Antennarum articulus 



