136 ZOOLOGICAL EXERCISES. 
Section BRACHYCERA. 
ANALYSIS OF THE FAMILIES. 
A. Third joint of antenne annulated. 
a. Antenne not clavate. 
* Teoulee small. 
| Tibize spurred . Aylophagrde. 
2 Tibee not spurred. | 
Longitudinal veins crowded 
anteriorly . Stratiomyide. 
Longitudinal veins not crowd- 
ed Acanthomeride. 
** Teoulee large. Tabanide. 
b. Antenne clnvaee . Midasida. 
B. Third joint of the antennee sited 
a. Basal cells large. 
* Thorax and sbdenied inflated ’ Cyrtide. 
** Thorax and abdomen not inflated. 
1 Empodium pulvilliform. 
Tibiz spurred. Leptide. 
Tibize not spurred . Hirmoneuride. 
2 Empodium styliform ; legs with bristles Asilide. 
38 Empodium none. 
+ Discoidal vein with two branches Therevide. 
++ Discoidal vein with one branch Bombylide. 
+++ Discoidal vein not branched 
tA spurious vein between cubital and 
discoidal Syrphide. 
+t No spurious longitudinal vein. 
{’ Cubital forked. . . Ncenoprnide. 
1 Cubital simple. 
a. Diseoidal simple. 
Antennal bristle thick . Myopide. 
Antennal bristle thin . Platypezide. 
