INSECTA DIPTERA. 



Oeder— DIPTERA. 



Two mesotlioracic wings with radiate veins ; posterior wings rudi- 

 mentary; moutli suctorial, furnished with a proboscis formed by the 

 labrum and labium, and enclosing the bristle-like, or knife-like, max- 

 illae and mandibles. Metamorphosis complete. Larva apodal. 



SuB-OiiDER— OVIPARA. 



The female lays eggs, or larvae just emitted from the eggs. 



Section— OBTECT^. 

 Pupa enclosed in a separate case, as in the Lepidoptera. 



Division — Nemocera. 

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



Family — Culicidj::. 

 Proboscis long and thread-like ; mandibles and maxillae free j 

 antennae filiform, plumose in the males, hairy in the females. 



aenus-CULEX. 

 Linn(BUS. 

 Palpi as long as the proboscis in the males, very short in the 

 females. 



C. ARGYROPUs. Walker, Cat. Dipt, in Brit. Mus.,p. 2 (1848). 



Female. Body black ; proboscis full half the length of the body; 

 antennae shorter than the proboscis ; sides of the thorax with silvery 

 spots. Legs black, very long; a silvery spot on each thigh, near 

 the tip, which is also silvery, as are those of the shanks and of the 

 joints of the feet. Wings tinged slightly with brown, their fore- 

 borders black ; veins dark brown, thickly fringed with black hairs ; 

 poisers dark brown. 



Length, 21 lines. 



New Zealand (Dr. Sinclair). 



C. iRACUNDUs. Walker, I.e., jj. 6 (1848). 



Female. Body black; head and thorax clothed with golden hairs ; 

 abdomen with a yellow band at the fore-border of each segment ; these 

 2 



