DiTTERA. -sir 



UBRISTES, n. g. 



Microdonti shmWs. Caput thorace lalius : aviteniiiE longae ; articulus 

 Ins longissimus, siil){:urviis ; 2us bvevissimus ; 3iis linearis, apicc coiii- 

 cus, lo paullo longior: tarsi lati ; tihia; postica; pilosa;. • 



Allied to Microdon. Male. Head broader tlian the chest: feelers 

 long ; first joint very long, slightly curved ; second very short ; third 

 linear, conical at the tip, a little longer than the first ; fourth springing 

 from near the base of the third: feet rather broad, especially the hind pair ; 

 hind-shanks very hairy : wing-veins like those oi Microdan, but the middle 

 cross-vein beneath the submarginal areolet is a mere stump. 



Ubristks FLAViTiBiA, Mas, Plate u, fig. 2. 



Ni(/ro-(cnea, .lailello picco, abdominis apice fulvo, nntennis riifis, pedilma 

 piceis, tarsisfulvis, tibiis posliris flaris Jlnvor/ue hirlii;, alis rinereis 

 basi et ad coslam fiiscis. 



Body black, shining, clothed with black hairs ; a white spot at the 

 base of the feelers : ftxce thinly clothed with white l)airs, adorned with two 

 white spots on each side : eyes black ; fore part nearly flat, its facets a 

 little larger than those elsewhere: mouth pitchy: feelers very dark red; 

 first joint clothed above with very short black hairs : chest slightly bronzed ; 

 scutcheon pitchy ; a purple tinge on the base of the hind -chest : abdomen 

 nearly spindle-shaped, a little narrower and much longer than the chest ; 

 tip dark tawny : legs pitchy, thickly clothed with short black hairs ; feet 

 dark tawny ; claws black, tawny towards the base ; foot-cushions pale 

 tawny; hind-shanks pale yellow, thickly clothed with bright yellow hairs : 

 wings gray, dark brown at the base and along two-thirds of the fore bor- 

 der ; wing-ribs pitchy ; veins black : poisers pitchy, dark taw iiy towards 

 the base. Length of the body 5 lines ; of the wings 10 lines. 



Brazil. 



