296 SYBPHIDiE. 



slightly grey ; veins black ; stigma brown. Halteres tawny. Abdo- 

 men black, peneons at the tip, adorned with four pair of large S2ibqitadrate 

 yellow spots, whose hivd sides are slightly obliqne ; fourtli pair smaller 

 than the others. Legs tawny ; hind legs black ; hind femora and 

 hind tibiag tawny at the base. Var. /3. Head slightly tawny on each 

 side in front ; first pair of abdominal spots almost triangular ; fourtli 

 transverse. Legs piceous. 



Generally distributed. (E. S. I.) 



32. scalaris, Fb. e. s. iv. 108. 312 (1792); Pz. ! fn. xlv. 20. 

 —gracilis, Mg. zw. iii. 228. 80 (1822) ; LI. ; Mg. ; Zii.—meUinnsyM-., 

 Fin. iEneus, antennis fulvis aut piceis, alls subcinereis, abdomine 

 nigro macidis bis quatuor suhtrigonis fulvis, pedibus fulvis, tibiis tar- 

 sisque posticis piceo-cinctis. Long. 3-4 ; alar. 6-8 lin. 



^Eneous. Antennae tawny or piceous. Wings slightly grey ; stigma 

 grey. Halteres tawny. Abdomen black, aeneous at the tip, with four 

 pair of tatvny spots ; first pair nearly round ; second and third pair sub- 

 triangular, slightly nndnlating on the outer side ; fourth pair transverse. 

 Legs tawny ; hind tibiae and hind tarsi with piceous bands. 



Generailj distributed. (E. S. I.) 



33. concolorj n. yEneo-viridis, antennis nigris articulo tertio 

 sublus ferrugineo, alis limpidis, abdomine macnlis sex subquadratis vix 

 conspicuis canis, pedibus fulvis. Long. 31- ; alar. 7 lin. 



iEneous-green. Antennfe black; third joint ferruginous beneath. 

 Wings colourless. Halteres tawny. Abdomen with three large sub- 

 quadrate very indistinct hoary spots on each side. Legs tawny. 



Eare. lu the collection of the Entomological Club. (E.) 



Genus XXVII. DOROS. 



DoRos, Mg. ; Mq. d. i. 5 (1834) ; Ztt. ; Edn. 3Iusca p., L. ; Dg. ; 

 Shll. ; Shf. ; Shr. ; Gf. ; Gm. Syrphus p., Fb. ; Pz. ; LI. ; Mg. 

 Mulio p., Fb. Milesia p., Fb. Eristalis p., Fb. Scceva p., Fin. 

 Baccha p., St. F. et Srv, 



Frons lavis, convexa. Epistoma vix elongatuni, ad os prominens. 

 AntenncB capitis latitudine conjunctim breviores, basi disjunctce ; arti- 

 culus quartus dorsalis ; quintus pnhescens. TJioracis latera flavo- 

 mactdata. Aim areolis discali et subapicali margine posteriore fere 

 ceqvaliter remotis et parallelis, areola subapicali integra, lobo axillari 

 dislincto, venis subcostali et radiali ad marginem disjunctis, vena trans- 

 versa prabrachiali ante areolce discalis medium locata. Abdomine 

 segmentis 5 {vel 6) tantum conspncuis. 



Head semicircular ; front everi, convex ; epistoma but little elon- 

 gated horizontally, a little comprcssetl beneath the antenn;r, with some 

 slight tubercles above the peristoma, protuberant towards the mouth. 



