CHALARUS. 233 



base of fore tarsi yellowish. Fern. Hypopygium short, globular, with a 

 blackish spine. 

 Not rare. (E.) 



8. ruralis, Mg. zw. iv. 22. 8(1824); Mq. ; Wlk.; Ztt. Cinereus, alis 

 subcinereis, aldominis lateribus cano-maculatis, genubus fulvis, tarsis 

 piceis. Long. 1^-2 ; alar. 4f-5|- lin. 



Cinereous. Head silvery. Wings pale grey . Halteres piceous, with 

 whitish bands. Abdomen with triangular hoary spots along each side. 

 Legs black ; knees tawny, tarsi piceous. 



Generally distributed. (E. S.) 



9. auctus, Mn.d. s. syrph. 61. 1. 2(1816); Mg. ; Mq.; Wlk.; 

 Ztt. Cinereus, alis subcinereis, abdominis lateribus cano-maculatis, 

 genubus fulvis, tarsis piceis. Long. 2 ; alar. 4^ lin. 



Cinereous. Head silvery. Wings pale grey. Halteres ferruginous. 

 Abdomen with triangular hoary spots along each side. Legs black ; 

 knees tawny ; tarsi piceous. 



Not common. (E. S. I.) 



Genus II. CHALARUS. 



CHALARUS, Wlk. e. m. ii. 269(1834). Pipunculus p., Mg. Cephalops 



p., Tin. Ateleneura, Mq. 

 Alee vena cubitali fere recta, praebrachiali et anali abbreviatis. 



Antennae with the third joint oval. Wings of moderate length ; third 

 cubital vein almost straight ; prabrachial and anal veins imperfect. 

 Abdomen depressed. 



Male. Eyes parted. 



1. holosericeus, Mg. zw. iv. 34. 12 (1824); Mq.; Wlk.; Ztt. 

 Niger, thoracis lateribus abdomineque nigro-fuscis, alis subcinereis, pe- 

 dibusfuscis ; Fcem. tarsis flavis. Long. 1 ; alar. 2 lin. 



Black, dull. Sides of the thorax and abdomen blackish-brown. Wings 

 pale grey. Male. Halteres and legs brown ; knees and tarsi paler. Fern. 

 Halteres and legs yellow ; femora and tidies mostly brown. 



Not common. (E. I.) 



2. spurius, Fin. d. s. syrph. 16. 3 (1816); Mg. ; Wlk.; Ztt. 

 velutinus, Mq. Niger, alis cinereis ; Fcem. abdomine tarsisque nigro- 

 fuscis. Long. 1-li ; alar. 2-2| lin. 



Black, dull, hairy. Wings dark grey. Fern. Wings paler. Abdomen 

 and tarsi blackish-brown. 

 Not common. (E. I.) 



3. exiguus, Hal. e.m. 1. 162 (1833). Cinereus, alis limpidis, hal- 

 teribus albis, pedibus fusco-pallidis. Long, f ; alar. 1 lin. 



VOL.I. 2 H 



