CYCLORRHAPHA 



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SUBORDER II. CYCLORRHAPHA. 



Section 1: Aschiza. — This group includes the family vSyrphid^e, 

 of which no species is known to bite man. 



Section 2: Schizophora.- — This group includes the true flies 

 characterized by a distinct frontal lunula and a frontal suture; 

 antennae with three simple segments, and an arista which is generally 

 dorsal. They may be classified into — 



Muscoidea. 



Synonym. — Eumyidea. 



This superfamily is divided into : — 



Tribe i: Muscoidea acalyptratce, without squamse covering the 

 halteres (see Chapter XXXV.). 



Tribe 2: Muscoidea calyptratce, with squamae covering the 

 halteres. 



MUSCOIDEA CALYPTRAT.E. 



1. CEstridae. 



2. Sarcophagidae. 



3. Muscidae. 



4. Anthomyidae. 



Diagnostic Table. 



A. First posterior cell of the wings not widely open. 



I. Antennae small, more or less hidden in round pits; 

 arista single or plumose; body very hairy — 

 (E sir ides. 



II. Antennae well marked, not hidden; arista more or less 



plumose; body not very hairy. 

 {a) Arista plumose for only half its length, bare 



in the terminal half, which is hair-like — 



SarcophagidcB. 

 {b) Arista plumose or pectinate along its whole length 



— MuscidcB. 



B. First posterior cell widely open — AnthomyidcB, 



Family O^strid^. 



Muscoidea calyptrafce with very hairy bodies, which cause them 

 to resemble bees. Antennae inserted into round pits, with a terminal 

 bristle on the third joint. Mouth-parts rudimentary. 



Remarks.— The CEstridae are commonly known as the bottle or 

 warble flies, and are of interest because the larvae become parasitic, 

 either under the skin, in the nasal or pharyngeal cavities, or in 

 the alimentary canal. 



Classification. — The genera may be grouped into two subfamilies — 

 (a) (EstrincB with rudimentary proboscis, including the genera Gastro- 



