ORIENTAL CTCADID^. 43 



Long. excl. tegm. <? , 28 to 30 millim. ; ? , 26 to 28 millim. Exp. tegm. ^ , 78 to 85 millim. ; 

 2 , 74 to 78 millim. 



Hab.— Continental India : Seebsagar (Calc. Mus.) ; Assam, Margberita (Doberty— coll. Dist.) ; Khasi 

 Hills (Cbennell— coll. Diet.). Tenasserim : Myitta in the Valley (Doberty— coll. Dist.). Malay Peninsula : 

 Malacca (Wallace — Brit. Mus.). 



This species is most variable in coloration, resembling in that respect D. mannifera, 

 but the extraordinary shape of the opercula— a perfectly constant character— renders its 

 identity at once discernible. 



Genus COSMOPSALTEIA. 



Cosmopsaltria, Still, Hem. Afr. iv. p. 5 (18GG) ; Atkius. J. A. S. Beng. vol. liii. p. 226, n. 53 (1885). 

 Sub.-gen. Flatylomia, Cosmopsaltria, and Diceropyya, Stal, Ofv. Vet.-Ak. Forli. 1870, p. 708 note. 



Closely allied to Dundubia, but witb the rostrum always reaching and sometimes passing the posterior 

 C0X8B ; the head also generally has the front not twice as broad at the base as the anterior margins of the 

 lobes of vertex. Opercula long, reaching centre and sometimes the apex of the abdomen. 



This is a most unsatisfactory genus to define, and may be taken as a good example of the 

 artificiality of some generic creations, though serving a useful purpose in classification. 



The length of the rostrum is really the only universal character separating CiKsiiwpsaltria 

 from Dumlithia, though many of its species have, in the shape of the head, a good distinctive 

 characteristic. A number of its species have also unspotted tegmina, a feature of Dundubia, 

 though more diverge considerably from this character. It might therefore be more strictlv 

 accurate to treat Cosmopsaltria as a subgenus or section of Dundubia ; but as the former already 

 contains an exceedingly large number of species, I have preferred, for the pm-poses of more 

 easy identification, — an object of the present monograph, — to retain the two generic 

 creations as distinct. For the above reasons I have been compelled to transfer several species 

 I described under Dundubia to this genus. 



Still proposed (supra) three subgenera of Cosmopsaltria, but the study of a large number of 

 species has shown that these nuist be considerably increased in number to be of any value, 

 and I have found them capable of being somewhat clearly reduced to sections by other 

 characters than those on which Sti'il relied. 



Cosmopsaltria is distributed throughout our faunistic area, and is also found in the 

 Australian and parts of the Pacific Regions. 



A. Head witli tite front globoscly produced as in Dundubia. 



a. Opercula more or less constricted on each side near base and with their apices rounded. 

 b. Tegmina ttnspotted. . 



1. Cosmopsaltria amicta. (Tab. VIII., fig. 4, a, b.) 



J iiiiulul'iii iiDiiftd, Distiiut, Auu. & Mag. Nat. Hist. ser. 6, vol. iii. p. 51 (1889). 



Body above brownish-ochraceous. Head with strife to front and two central longitudinal lines, a broad 

 oblique fascia on each side of vertex between eyes and ocelli, and the area of the ocelli black. Pronotum 

 with two central longitudinal black hues, anterior margin and the inner edge of the posterior margin 

 black; posterior and lateral margins paler in hue, the last crossed by an oblique black fascia emerging 

 from behind the eyes. Mesonotum with live black fascia', one central and longitudinal, two short and 



