238 



LEPTID^ 



Meig. c? (Brauer, Sitzber, Akad. d. Wissensch, Wien, 1898, p. 534) which Schiner 

 in his Fauna Austr. i., 451 gives as Remorcea rudis Fall, has a thin " touch ' hair 

 just before the end of each of the five joints of the front tarsi on each side, which 

 is protected by the strong straight black lateral end-bristle which it almost touches. 

 This 'touch' hair has the same direction (turned sideways) as the bristle and 

 scarcely overtops it. On the middle tarsi the 'touch' hairs occur on only the 

 three last joints, and there are none on the hind tarsi." 



" It may be seen from these remarks that my examination of the ' touch -hairs ' 

 on the anterior legs of the Diptera has no claim to completeness. I only wished 

 to note the occurrence of these organs and at the same time to point out that they 

 possess a constant systematic value. Perhaps some student will find an induce- 

 ment to make further and more minute investigations of this subject, which seems 

 to me to possess sufKcient interest," 



Type of venation of the Leptid.^. 



Pio. 104. — Leptis iringaria ?. 



Longitudinal {or long) veins. 



a Costa (or costal vein), 

 h Mediastinal {or auxiliary) vein. 

 c Subcostal {or \st longitudinal) vein. 

 d Radial {or Ind longitudinal) vein. 

 e Cubital {or Zrd longitudinal) vein. 



e^ Lower branch} ""^ ^^^ •^'^^i^^l ^^^k. 

 / Discal {or 4th longitudinal) vein. 



f Upper veinlet ^ 



f- Second veinlet - from the discal cell. 

 _ P Third veinlet J 

 g Postical {or 5th longitudinal) vein. 



h Anal {or 6th longitudinal) vein. 



i Axillary vein. 



h Praef urea = the common stem of the radial and cubital veins. 



Ambient vein = the continuation of the costal vein round the hindmarpin of the 



Cross {or transverse) veins. 

 w Humeral cross- vein. 

 ,v Discal {or middle) cross-vein. 

 y Lower (or small) cross-vein. 



1 Costal {or mediastinal) cell. 



2 Subcostal cell. 



3 Marginal cell. 



Cells. 



