270 Mr. F.Walker's Characters of undescribed Diptera 



from thence to more than half the length, vitreous and colourless 

 towards the tips. 



Length of the body 6 lines; of the wings 12 lines. 



Mexico. 



Slratiomys pinguis, 



Faem. — Nigricans, capite ferrugineo- tomentoso antice albido- 

 pubescente, thorace ferrugineo-tomentoso vittis duabus fer- 

 rugineis, scutelli spinls duabus ferrugineis, abdominis seg- 

 mentis sub-aurato-fasciatis subtus albido-fasciatis vitta lata 

 fulva, femoribus tibiisque subtus tarsisque fulvis, alis limpidis 

 apud costani luridis. 

 Female. — Blackish. Head with ferruginous tomentum, above 

 with whitish pubescence in front ; hind side with silvery to- 

 mentum. Antennas black ; third joint lanceolate towards the tip, 

 much longer than the first. Thorax with ferruginous tomentum, 

 and with a ferruginous stripe along each side. Scutellum with 

 two ferruginous spines. Abdomen with bands of slightly gilded 

 tomentum on the borders of each segment ; underside with bands 

 of whitish tomentum, which are dilated on each side, and with a 

 broad tawny discal stripe. Femora and tibiae beneath and tarsi 

 tawny. Wings vitreous, lurid along the costa from the base to 

 nearly two-thirds of the length. 



Length of the body 6 lines; of the wings 12 lines. 

 This may possibly be the female of S. conslricta, though so 

 different from it in appearance. 

 Mexico. 



Genus Clitellaria, Meig. 

 Clitellaria obesa. 



Mas. — Cyanea, capite antennisque nigris, thorace conico, scu- 

 tello spinis quatuor, abdomine nigro sub-punctato, pedibus 

 nigris, tarsis fulvis, alis sub-cinereis basi fuscescentibus, ma- 

 cula costali fusca, venis nigris. 

 Male. — Dark blue, thick. Head black. Antennae black, 

 shorter than the breadth of the head ; third joint linear, acu- 

 minated ; arista shorter than the third joint. Thorax conical. 

 Scutellum with four spines. Abdomen black, minutely punctured, 

 not longer than broad. Legs black; tarsi tawny. Wings grey- 

 ish-vitreous, brownish at the base, and with a brown spot by the 

 costa before half the length ; veins black. 



Length of the body 4 lines; of the wings 10 lines. 

 Mexico. 



