CORTICICOLINA. 267 



with close, short, yellowish hairs ; in the middle a longitudinal 

 yellowish line ; claval region on the basal % snow-white, posterior 

 \ blackish ; Membrane fuscous ; rather paler posteriorly, with 3 long, 

 inwardly pointing, white spots ; 1 under the apex of the corium, 1 

 near the end of the inner margin, and 1 forming a triangle with the 

 others. Legs yellow-brown; tarsi; 3rd joint piceous-black ; claws 

 yellow-brown. 



Length, 1 line. 



On Lemna, and other aquatic plants ; June and July, Plumstead 

 Marshes ; Isle of Wight (a. Lewis) ; Southgate (F. Walker) ; West 

 of England (Dale). 



SECTION . CORTICICOLINA* 

 FAMILY L ANEURID^E. 



Genus 1. ANEURUS, Curt. 

 Very flat and thin, long-oval, smooth. 



Head very broad, 4-sided, widened behind the eyes and then sud- 

 denly, obliquely narrowed to a short neck ; Face ; central lobe very 

 prominent, long, broad, convex, rounded in front ; side lobes short, 

 narrow, pointed ; antenniferous processes short, broad, the end 

 straight. Antennae, the 1st and 2nd joints petiolate; 1st thick, 

 reaching a little beyond the end of the face ; 2nd about the same 

 length, oval ; 3rd rather more than half the length of the 4th, apex 

 straight ; 4th long, fusiform-clavate, as long as the 2nd and 3rd to- 

 gether. Eyes moderate, semiglobose, rather prominent. Rostrum, 

 not half the length of the head, 2nd joint broad, triangular ; 3rd 

 conical, pointed ; rostral channel widened into a triangle, then pos- 

 teriorly contracted. 



Thorax. Pronotum twice as broad as long ; indistinctly 6-sided, 

 anterior margin half the length of the posterior margin, concave, de- 

 flected forward ; sides on the 1st f rds a little concave, divergent, then 

 rounded, the last 3rd almost straight or a little convergent to the 

 acute posterior angles ; posterior margin very slightly concave ; 

 disk in front, within the anterior margin, transversely raised in the 



* Page 25. 



