SYSTEMATIC ZOOLOGY. 135 
ORDER DIPTERA. 
ANALYSIS OF THE SECTIONS. 
A. Antenne six or more jointed ; Palp four or 
five jointed Nemocera. 
B. Antennz three-jointed ; on one or share! 
jointed . ; Brachycera. 
Section NEMOCERA. 
ANALYSIS OF THE FAMILIES. 
A. Thorax without any transverse suture. 
a. Tibiz not spurred. 
* Wings hairy. 
Longitudinal veins few . Cecidomyrde. 
Longitudinal veins many . Psychodide. 
** Wings naked. 
+ No ocelli. 
] Legs long ; antennz with more 
than twelve joints. 
Costal vein continued round 
the margin of the wing . Culrcide. 
Costal vein ending near the 
tip of the wing . . Chironomde. 
2 Legs short; antennz with less 
than twelve joints . Sumulide. 
++ Ocelli three. 
No discal cell Bibionide. 
A discal cell ; ; Rhyphide, 
b. Tibize spurred. 
Anterior tibiz unarmed . . Blepharoceride. 
All the tibize spurred ; . Mycetophilide, 
B. Thorax with a V shaped, transverse suture Tipulida, 
