Homopterous family Membracidaj. 343 



increasing in distinctness from the middle to the apex, the latter 

 broad, truncated, depressed, terminally bisinnate-tridentate. 

 TypeD. laticauda. 



Dectonura laticauda. PI. VII, f. 21. 



^ Darnis laticauda, Fairm., Ann. Eut. Ser. 2, iv, p. 483, 22 

 (1846). 



Constancia (H. Clark). Brit. Mus. 



The ''Darnis lineola, of Walker, appears to be a new genus 

 allied iQTomogonia, of Stal ; D. histriga, a species of lih&xia ; 

 ^D. tripartita and ^D. stupida, so far as T can judge from Fair- 

 maire's figure of IT. ^irxux, are referable tonyphrus of Stal. 



The old genus Hemiptycha has been spht up by Stal as 

 follows: — l^-Pi'oterpia, type H. rotundicornis, Fairm.; 2. Eualthe, 

 type JI. Icevigata, F. ; 3. ^Bnhalopa, type 'jET. /areata, F. ; 4. 

 Hemiptycha, typical; o?Pyranthe, type H.fiava, F.; 6. Alcmeone* 

 type ^//. centrotoides ; 1 : Hypkinoe, type ^/. cnneata, Germ.; 

 I shall enumerate here the species referable to the two last 

 groups in which the Collection of the British Museum is rich. 



ALCMEONE, Stal. 



1. "Alcmeone lata. 



Hemiptycha /r/ to. Walker, List Homopt. ii, p. 571, 18. (1851). 

 Hab, — ? Type Brit. Mus. 



2. ^Alcmeone 2'>icea. 



Hemiptycha picea, Fairm., Ann. Ent. Ser. 2, iv, p. 316, 13 

 (1846). 



Brazil. Brit. Mus. 



Erroneously referred to P y rout he by Dr. Stal; it is nearly 

 allied to -4. centrotoides. 



* Missimia, Stal, is more nearly allied to this genus than to typical 

 Hcinijitijcha. 



