ACTOEA. 157 



following additional species of Ccelopa have been recorded as 

 British : 



1. simplex, Hal. Subgen. MALOCOMYIA, HaL 



2. parvula, Hal. 3. sciomyzina, Hal. 



Genus IV. ORYGMA. 



ORYGMA, Meig. Zw. vi. 6 (1830) ; Mcq. ; Zett. Psalidomyia, Doumerc. 



Corpus coriaceum, sat breve, subdepressuin, vix setosum. Caput thorace 

 vix angustius. Frons latissima. Antennae breves ; articulus tertius 

 conicus, secundo multo longior ; arista nuda. Abdomen subovatum, 

 segmento secundo magno. Pedes pilosi, setosi. 

 Body coriaceous, rather short, almost flat, with a few bristles. Head 

 nearly as broad as the thorax ; front flat, very broad; face concave, 

 nearly vertical ; epistoma and peristoma not prominent. Proboscis and 

 palpi very short. Antenna? short, not reaching the epistoma ; third 

 joint conical, much longer than the second ; sixth slender, bare. Tho- 

 rax flat. Wings moderate ; costal vein ending on the hind border at 

 some little distance from the tip of the wing ; subcostal ending before 

 half the length ; mediastinal ending a little beyond half the length ; 

 cubital and praebrachial diverging between the transverse veins, almost 

 parallel from the discal transverse to the border; discal transverse 

 nearly upright, very slightly oblique, parted by much more than its 

 length from the prsebrachial transverse, and by more than half its 

 length from the border. Abdomen flat, nearly oval, with six segments, 

 -a little longer than the thorax ; second segment large. Legs hairy 

 and bristly. 



1. luctnosa, Meig. Zw. vi. 6. 1 (1830); Mcq.; Zeit.fucicola, 

 Doumerc. Nigra, obscura, capite subtus ferrugineo, antennis piceis basi 

 ferrugineis, thorace cinereo-quadrivittato, alis cinereis, pedibus testaceis. 

 Long. 3 ; alar. 6 lin. 



Dull black. Head ferruginous beneath. Antennaa piceous ; first 

 and second joints ferruginous. Thorax with four cinereous stripes* 

 Wings grey. Halteres and legs testaceous. 



Inhabits seaweed. (E. S. I.) 



Genus V. ACTORA. 



ACTORA, Meig. Zw. v. 403 (1826). Heteromyza p., Fal. Helcomyza, 

 Curt. 



Corpus elongatum, hirsutissimum, non depressum nee coriaceum. Caput 

 thorace vix angustius, antice brevi-conicum. Palpi subclavati. An- 

 tenna brevissima ; articulus tertius subrotundus, secundo non longior ; 



