SCENOPINID^ 



595 



connecting link between the Mydaidm and Sccnopinidw occurs in the 

 ChiHan genus Megascelus. 



The Scenopinidce are composed of very few species (not more than 

 twenty-four) and of only one or two genera, of which only the genus 

 8cenopinus occurs in the Palsearctic region ; species occur in North 

 America (down to Florida), while one has been recorded from New 

 Guinea, and one from Hawaii. 



Type of Venation of the Scenopinid^. 



h' 



Fig. 329. — Scenopinus fencstralis $. 



Longitudinal {or long) veins. 



a Costa {or costal vein). 

 h Mediastinal {or auxiliari/) vein. 

 c Subcostal {or '[st longitudiiwl) vein. 

 d Kadial {or Ind longitudinal) vein. 

 e Cubital {or Zrd longitudinal) vein. 



/ Discal {or Uh longitudinal) vein. 



fi Upper veinlet from the discal cell, 

 gi Lower veinlet from the discal cell. 

 g Postical {or 5th longitudinal) vein.* 



g^ Upper branch of the postical fork, if that anastomoses with or sup- 

 plants the lower branch of the discal vein all along the underside of 

 the discal cell. 

 g- Lower branch of the postical fork. 

 h Anal {or 6th longitudinal) vein. 

 i Axillary vein. 



k Prsef urea = the common stem of the radial and cubital veins. 

 Ambient vein absent. 



Cross {or transverse) veins. 

 IV Humeral cross-vein. 

 X Discal {or middle) cross-vein. 



y Lower {or small) cross-vein probably absent, " y " being part of the discal vein. 

 Anal cross-vein =9'"^. 



Cells. 



1 Costal {or mediastinal) cell. 



2 Subcostal cell. 



3 Marginal cell. 



4 Submarginal cell. 



4-'' Second submarginal {or cubital) cell {or cubital fork-cell). 

 * Vide Corrigenda for a corrected iiitprpretation of tlrs vein. 



