540 LIST OF DIPTERA. 



Group III. 



Microdon globosus, Wied. Auss. Zxveif. ii. 86, 11. Mulio glo- 

 bosus, Fabr. Syst. Anil. 185, 9. Aphritis globosus, Macq. 

 Dipt, Exot. ii. 13, 5, pi. 1, /. 4. Dimeraspis podagra, New- 

 man, Ent. Mag. v. 373. 



a. Illinois. Presented by E. Doubleday, Esq. 



Group IV. 



Microdon varius, n. s., fem. Flavus nonnunquam piceo maculatus, 

 capitis disco nigro, thorace nigro, lateribus fascia scutellique 

 margine Jlavis, abdomine maculis quatuor vittis duabus apice- 

 que nigris, antennis fuscis, articulo So. subtus flavo, pedibus 

 flavis,femoribus tibiisque posticis piceis, alisfusco variis. 



Body yellow, thickly clothed with short tawny hairs : disk of 

 head black ; a pitchy streak between the feelers and the mouth, 

 which is also partly pitchy : eyes reddish brown ; facets on the fore part 

 of the crown rather larger than those elsewhere : feelers brown ; 

 third joint yellow beneath, excepting the tip ; bristle tawny : chest 

 and breast black ; sides yellow ; a yellow band in front of the 

 scutcheon, whose hind border is also yellow ; sides and hind part 

 of chest armed with a few long black bristles : abdomen thickly 

 punctured, much longer than the chest, with a black stripe along 

 each side to the tip, which is also black, adorned with a black spot 

 on each side of the base, and with two truncate conical black spots 

 on the back: legs pale yellow, hairy ; hind thighs towards the tips 

 and hind shanks pitchy ; lips of claws black : wings slightly gray, 

 marked with a small brown spot on the middle of the fore border, 

 and beyond it with two brown bands ; wing-ribs tawny : veins 

 pitchy ; poisers yellow. Length of the body li — 2 lines ; of the 

 wings 3f — 5 lines. 



Var. /3. Pitchy instead of black : abdomen tawny at the tip : 

 hind thighs and hind shanks pitchy : brown marks on the wing 

 confused in one large spot. 



a. Sierra Leone. Presented by the Rev. D. F. Morgan. 



Chrysotoxum, Meigen. 



Chrysotoxum bicinctum, Latr. Gen. Crust, iv. 327. Cons. Gen. 

 443. Meig. Dipt. iii. 168, 1. Macq. Hist. Nat. Dipt. i. 489, 1. 

 Zett. Ins. Lapp. 588, 4. Loeiv, Ent. Zeit. Stettin, ii. 138, 





