HEMIPTERA. 46'7 



3. COPIUS histrio. 



Alydus histrio, Fab. S. R. 248. 2 (1803). 

 Copius histrio, Burm. Handb. ii. 330. 1 (1835). 



a. Brazil. From Mr. Children's Collection. 



b. Columbia. From M. Goudot's Collection. 



c. British Guiana. Presented by Sir Robert Schomburgk. 



d. S. America. Presented by Sir A. Calcott. 



e. . Presented by General Thomas Hardwicke. 



Family 5. ALYDID^E. 



Head triangular; lateral lobes produced in front of the insertion 

 of the antennae; central lobe reaching the apex. Eyes very promi- 

 nent, generally pedunculated or nearly so. Ocelli more or less 

 approximated*, generally very close. Antennae with the apical 

 joint as long as, or longer than, the preceding. Membrane of 

 the elytra generally with simple nervures. 



TABLE OF GENERA. 



I. Ocelli placed between the eyes. 



A. Ocelli distant, nearer to the eyes than 

 to each other ; posterior tibiae pectinated 



internally 2. HYPSELOPUS. 



B. Ocelli approximated; posterior tibiae 

 simple. 



a. Elytra entirely membranous 1. HYALYMENUS. 



b. Elytra coriaceous at the base. 



1. Second and third joints of the 

 antennas nearly equal ; posterior 

 thighs more or less thickened and 



spinous 3. ALYDUS. 



2. Second joint of the antennae much 

 shorter than the third; posterior 



thighs slender, unarmed 4. EUTHETUS. 



II. Ocelli placed behind the eyes 5. MICRELYTRA. 



Genus 1. HYALYMENUS. 



Alydus, p., Fab. Syst. Eh. (1803); Burm. Handb. ii. (1835); 



H. Sch. Wanz. viii. (1846). 

 Hyalymenus, Am. $ Serv. Hem. 224 (1843); H. Sch. Wanz. ix. 



243 (1851). 



* Except in the genus Hypselopus, which has the ocelli rather nearer 

 the eyes than to each other. 



