810 LIST OF DIPTERA. 



Idia obsoleta, Wied. Auss. Ziveif. ii. 355, 12. 

 a. China. Presented by G. T. Lay, Esq. 



Idia Chrysippe, n. s., fern. Viridis, micans, thoracis lateribus cyaneo 

 purpureoque variis, scutello purpureo, abdomine aureo-viridi, an- 

 tennis palpisque fulvis, pedibus ferrugineis, tarsis piceis, alis lim- 

 pidis basi fulvis. 



Body beset with a few black hairs and bristles : head emerald 

 green, slightly covered with white bloom, tawny on the crown, paler 

 in front, adorned with golden bloom on each side of the face, clothed 

 beneath with short yellow hairs ; a broad pitchy furrowed stripe 

 fringed with bristles between the eyelets and the feelers : sides of the 

 face fringed with bristles at the base ; epistoma very prominent, pale 

 ferruginous, green towards the base ; eyes dark red, convex ; all the 

 facets small : sucker black, pitchy and clothed with tawny hairs at 

 the tip ; palpi tawny, beset with black bristles : feelers tawny, 

 shorter than the face ; third joint more than twice the length of the 

 second, brown above : chest green, bluish and tinged with purple on 

 each side ; scutcheon, excepting the base, intense purple : abdomen 

 golden-green, obconical, shorter than the chest, bluish green 

 towards the base : legs ferruginous ; feet pitchy ; foot-cushions taw- 

 ny : wings colourless, tawny at the base ; wing ribs and veins 

 tawny ; veins black towards the tips ; tip cross-vein a little without 

 the perpendicular to the fourth longitudinal vein, with which it is 

 rounded at the junction, curved outward at the base, and having a 

 slight inward curve from thence to the tip, joining the border at 

 some distance above the tip of the wing ; lower cross-vein with two 

 long and almost imperceptible curves, the lower inward, the upper 

 outward ; scales slightly gray, with pale tawny borders. Length of 

 the body A\ lines ; of the wings 10 lines. 



Mesembrina, Meigen. 



Mesembrina meridiana, Meig. Dipt. v. 11, I, pi. 42, /. 25. Desv. 

 Essai Myod. 401, 1. Macq. Hist. Nat. Dipt. ii. 274, 2, pi. 16, 

 /. 19. Zett. his. Lapp. 652, 2. Dipt. Scand. iv. 1343, 2. 

 Musca meridiana, Linn. Syst. Nat. ii. 989. Faun. Suec. 1827. 

 Gmel. Ed. Syst. Nat. i. 5, 2838, 63. Fair. Sp. Lis. ii. 435, 3. 

 Ent. Syst. iv. 312, 2. Syst. And. 284, 3. Deg. Ins. vi. 55, 2. 

 Schrank, Ins. Austr. 454, 922. Faun. Boic. iii. 2480. Panz. 

 Faun. Germ. x. 17. Fall. Muse. 51, 30. Beaum. Ins. vi. pi. 

 12, f. 12, pi. 26, /. 6—10. Harr. Ex. 37, pi. 9, /. 9. Geoff. 

 Ins. ii. 495, 5. Schaf. Icon. pi. 108, /. 7? Herbst. Gem. 

 Nat. viii. 108, 11, pi. 340. Stew. El. ii. 257. Turt. iii. 597. 



