( 267 ) 



XX. List of the Hemiptera collected in the Amazons by 

 Prof. J. W. H. Trail, M.A., M.D., in the 

 years 1873 — 1875, with descriptions of the neio 

 species. By F. BucHANAN White, M.D., 

 F.L.S. 



[Read November 5th, 1879.] 



PART I. 



Fam. HYDROMETRID^. 

 Hydrometra, Latr. 

 (Limnobates, Burm.) 



1. H. metator, B. W., Journ. Linn. Soc. (Zool.) xiv. 



486, 9. 

 Hab. — IJru9aca, Rio Jurua (November 1, 1874). One 

 specimen. 



2. H. mensor, n. sp. 



Testaceo-brunnea, oculis rufo-brunneis, tibiis ad apicem 

 tarsisque fusco-brunneis. Capite parte anteociilari parte 

 postoculari fere 1 h longiore ; pronoto ante marginem 

 posticum tuberculis 2 subelongatis instructo ; liemelytris 

 dimidio abdominis tegentibus. 



$. Long. 11^ — 12^ mm. 



Hab. — Manaos (August, 1875). Two specimens, "at 

 light," on board the steamer. The much smaller size will 

 at once distinguish this from //. metator. 



Fam. VELIID^. 

 Velia, Latr. 



3. V. virgata, B. W., Joum. Linn. Soc. (Zool.) xiv. 



486, 11. 

 Hab. — Igarape da Caxocira, near Manaos (June 4, 

 1874), and Manaos (August, 1875). Two specimens, 

 *' at light," on board the steamer. 



TRANS. ENT. soc. 1879.^PiVRT IV. (dEC.) U 



