2l8 DURHAM DIPTERA. 



XXXI. 



144 (145). Third antennal joint at least three times as long as 



the second. Melanota, Rnd. (361) 



145 (144). Third antennal joint at most twice as long as the 



second. Anthracomyia, Rnd. (367) 



146 (143). 0.4 2 ending in the fore margin, generally far before 



the wing tip. 



147 (148). Cheeks and jowls very broad, the latter as broad 



as the long-diameter of the eye. 



Dexia, Mg. (430) 



148 (147). Cheeks and jowls narrow, the latter only reaching 



a little below the eyes. 



149 (150). V.I. and V.3. bearing thorns. 



369. Thelaira, Dsv. (1760. leucozona, Pz.) 



150 (149). V.I. and V.3. not thorned, or at most V.3. with two 



or three thorns at the base. 



151 (152). V.4. with a hang-vein at the bend. 



420. Nyctia, Pz. (1882. haltei-ata, Pz.) 



152 (151). V.4, without a hang-vein. 



Anthracomyia, Rnd. (367) 



tables of species. 

 Sub-Family Tachiniisme. 

 The larvae are parasitic in the larvae of Lepidoptera. 

 332. Meigenia, Dsv. 



1 (4). Eyes very indistinctly haired, often appearing bare. 



2 (3). Third antennal joint four times as long as the second. 



(1655. bisignata, Mg.) 



3 (2). Third antennal joint at most three times as long as the 



second, generally shorter. (1657. floralis, Mg.) 



4 (1). Eyes very distinctly hairy. (1658. majuscula, Rnd.) 



335. Masicera, Mcq. 



1 (2). Lower fronto-orbital bristles invading the cheeks in a 



single regular row. (1662. firatensis, Mg.) 



2 (1). Lower fronto-orbital bristles invading the cheeks in a 



double row or irregularly. (1661. sylvatica, Fin.) 



