220 Mr. W. L. Distant on 



Genus Plonisa. 



Plonisa plagiata. 



Plonisa plaqiata, Sign. Ann. Soc. Ent. Fr. s^r. 6, t. i. p. 327, pi. xi. 



fi?. 62 (1881). 

 JEthus hrunnipemiis, Dall. (nee Fabr.) List Hem. i. p. 113. n. 3 (1851). 



Katakadia, gen. no v. 



Pronotum with a very deep angulated cavity for the inser- 

 tion of the liead. Head very broad at anterior margin, where 

 it is centrally sligiitly sinuate ; the lateral lobes longer than 

 the central, angularly narrowed posteriorly, being longest 

 behind the eyes. Other characters generally as in Gydnus. 



This genus is founded for the reception of j^thus caUgi- 

 nosus, Walk., and the very peculiar structure of the head 

 and pronotum will sufficiently distinguish it. 



Katahadia caliginosa. 



yEthus caliginosus, Walk. Cat. Het. i.p. 161. n.81 (1867). 

 Hob. Malacca (Brit. Mus.) ; Perak {Doherty, coll. Dist.). 



Genus Cydnus. 

 Cydnus rudis. 



jEthus rudis, Walk. Cat. Het. i. p. 157. n. 57 (1867). 

 ^thtis proximusj Sign. Ann. Soc. Ent. Fr. s^r. 6, t. ii. p. 27. n. 18 

 (1882). 



Walker in his description made no mention of the reddish- 

 brown hue of the corium in his type specimen from the 

 Gambia. Other specimens from Sierra Leone are in the 

 British Museum. There seems little doubt that both the 

 above descriptions refer to one species. 



Cydnus insular is. 



Cydnus insularis, Westw. in Hope Cat. i. p. 19 (1837). 

 Mhus rubrifemur, Walk. Cat. Het. i. p. 153. n. 34 (1867). 



Cydnus varians. 



Cydnus varians, Fabr. Syst. Rhyng. p. 187 (1803). 

 Mhus discolor, Walk. Cat. Het. i. p. 161. n. 82 (1867). 



Cydnus lepidus. 



jEthus lepidus, Stal, (Efv. Vet.-Ak. Forh. 1853, p. 215. 6 ; Hem. Afr. 



i. p. 21 (1864). 

 Stilus leucostigma, Dall. (Germ. Rev. Silb. v.) List Hem. i. p. 119 



(1851). 



The name quoted by Dallas appears to be a MS. one only, 

 as I can find no trace of such a species described by Germar. 



