ilPTERA OF NEW ZEALAND. 



INSECTA DIPTERA. 



AETIFICIAL KEY TO THE PRINCIPAL GROUPS. 



[Descriptions of these groups will be found in the " Monograph of the Diptera of 

 North America," by Loew and Osten Sacken : Part I., published by the Smithsonian 

 Institution ; price Ij dollars.] 



Analysis of the Sections. 



A. Antennae six- or more jointed ; palpi four- or five-jointed. Nemocera. 



B. Antennae three-jointed ; palpi one- or two-jointed. Brachycera. 



Section — Nbmoceea. 

 Analysis of the Families, 



A. Thorax without any transverse suture. 



a. Tibiae not spurred. 



* Wings hairy. 



Longitudinal veins few. Cecidomyidce. 

 Longitudinal veins many. Psychodidce. 

 ** Wings naked, 

 t No ocelli. 



1. Legs long ; antennae with more than 12 joints. 



Costal vein continued round the margin of the wing. Culicidce. 

 Costal vein ending near the tip of the wing. CMronomidcE. 



2. Legs short ; antennae with less than 12 joints. Simulidce. 

 tt Ocelli three. 



No discal cell. Bihionidce. 

 A discal cell. Rliyphidce. 

 h. Tibiae spurred. 



Anterior tibiae unarmed. Blepharoceridcu. 

 All the tibiae spurred. MycetophilidcB. 



B. Thorax with a V-shaped transverse suture. Tlpulidce. 



Section — Beachtceea. 

 Analysis of the Families. 

 A. Third joint of the antennae annulated. 

 ^. Antennae not clavate. 



* Tegulae small. 



1. Tibiae spurred. Xylophagida. 



2. Tibiae not spurred. 



Longitudinal veins crowded. Stratiomyidce. 

 Longitudinal veins not crowded. Acanthomeridce, 

 ** Tegulae large. Tabanidce. 

 b. Antennae clavate. Midasidce. 



