378 INSECTS. 



3. Brachial veins without spurious veins. 

 Platypezidag. Antennae, third joint globose, 



tjonical or tapering, tipped by a bristle. 

 'Conopidas. Antennae long, no bristle ; three 



first joints large, remainder small, 



pointed. 

 Pipunculidae. Antennae bearing a bristle 



on the upper edge of third joint; eyes 



reaching to the mouth. 

 Muscidae. (Housefly, <-c.) Antennas bearing 



a bristle on the upper end of third joint ; 



eyes bounded by the cheeks. 

 -c. Halter es covered by alulae, and head very -minute. 



Acroeeridae. 

 d. Proboscis obsolete. 



(Estridge. (Gadflies.) 



SUBSECTION III. HYPO CERA. 



Antennae very short, close io mouth, ihree jointed 



globose, bearing a bristle. 

 Veins of wings few, not branching. 

 Family : 

 Phora. 



SECTION III. EPROBOSCIDEA. 



Mouth having a tubular proboscis. 

 Legs set on either side of a broad breastplate. 

 Antennce buried in furrows near the mouth. 

 Families : 



1. Head large, sunk in the thorax. 

 Hippoboscidias Forest-fly, Sheep-tick, fyc. 



2. Head small, thrown backwards, and held 



upside-down. 

 Nycteribiidaa. 



The above characters are taken from Mr. Walker's work 

 on Diptera. 



