Mr. W. L. Distant on Homoptera. od3 



fuscous ; head with a distinct longitudinal impression on each 

 side of ocelli. 



Long., excl. tegm., ($ 14 mm. ; exp. tegm. 39 mm. 



Hub. West Africa; Free Town, Sierra Leone (E. E. 

 Austen, Brit. Mus.). B. E. Africa; Samburu (C. S. Betton, 

 Brit. Mus.). 



Gymnotympana olivacea, sp. n. 



Body olivaceous ; sternum, opercula, and legs a little paler; 

 liead with the anterior margin of front piceous; anterior 

 tibi^ brownish, striped with fuscous, apices of tarsi fuscous ; 

 tegmina and wings hyaline, the venation olivaceous ; costal 

 membrane of tegmina olivaceous; rostrum just passing the 

 anterior tibial, its apex fuscous ; opercula in male with their 

 apices broadly rounded, inwardly somewhat obliquely sinuate. 



Long., excl. tegm., ^ ? 26-30 mm.; exp. tegm., (^70-78, 

 ¥ 90 mm. 



Ilah. Brit. Centr. New Guinea; Dinawu, 3600 feet (Pratt). 



Genus Plautilla. 



Plautilla, StSl, Ofv. Vet.-Ak. Forh. 1865, p. lo5 ; Hem. Afr. iv. p. 2 

 (1866). 



Type, P. stalagmoptera, Stal. 



By the kindness of Dr. Handlirsch of the Vienna JMuseum, 

 I have been able to examine a cotype, determined by Stal 

 himself, of P. stcdagmoptera, the type of the genus. 



(^ . The tympana are entirely uncovered; the opercula in 

 male large and convex, inflated, and projecting beyond the 

 lateral margins of the abdomen as in the genus Gyinnotymjmna ; 

 the tegminaare moderately short and broad, their greatest width 

 being a little less than half their length and half as broad 

 again as the wings; tegmina with eigiit apical areas, bases of 

 the upper vein to lower ulnar area and lower vein to radial 

 area fused ; pronotal lateral marginal areas angularly dilated, 

 thus resembling Zammara, to which Stal allied Plautilla, but 

 which belongs to a different subfamily, by the complete 

 absence of tympanal coverings ; head (including eyes) half the 

 width of base of mesonotum ; abdomen beneath (excluding 

 apical segment) concave, with a central longitudinal ridge and 

 tfie lateral margins recurved. 



This genus clearly forms the type of a new division, which 

 may be called Plautillaria, to be placed between the Melam- 

 psaltaria and Hemidictyaria. To the first it is allied by the 

 venation of the tegmina, and to the second by the head 



37* 



