136 TERACOLUS. 



Habitat. — S. Arabia. Equatorial Africa to Nigeria. 



Arabia. — Aden, February, March, and April [Col. Yerburi/ ; Mas. Brit.; Ccipt. 

 Nurse; Butler, P. Z. S. 1896, pp. 253-4). Husvvab, March, May, June, and 

 September [Col. Ycrhurij ; Miis. Brit.). Shaik Ofchman, February, March, and April 

 [Cot. Yerlj/n-i/; Mux. Brif.), May {Mii-s. BotJi.schilcl). Ilaithalliini, Marcli, April, and 

 December (f'o/. Yerbi/ri/ ; Miis. Brit.); March and December [Col. Yerburi/; Mus. 

 Rothschild). Lahej, February, May, and December [Cut. Yerbury ; Mus. Brit, ct 

 Mux. Rothschild). 



Equatokial At-iuca. — lombene Eange, north-east of Mount Kenya ( //'. A . Chaidi-r ; 

 Holland, Proc. U.S. Nat. Mus. xviii. p. 7G2, 1895). 



Wkst Africa. — Ilo, River Niger, January and February 1899 [iJr. C'uthbcrt 

 Christ 1/ ; E. M. Sharpe, Entomologist, vol. xxxv. p. 103, 1902). 



The " wet-season " form, T. i/erhur>/i, is very distinct i'roni the corresponding 

 ])hase of T. dfiira and T. heut/liin, as it lacks the black line along the inner margin, 

 this characteristic mark being replaced b}' a blackish spot near the posterior angle. 

 I am still doubtful about the "dry-season" form (true T. crm/ore). Dr. Holland has 

 recorded a specimen from Mount Kenya in Equatorial Africa as T. evacjore. I have 

 not yet seen an example from this ])art of Africa, and suspect that the specimen, a 

 nuile, may turn out to be T. hcui/li/ii. Some specimens of Teracolits, collected by my 

 friend Dr. Christy at Ilo in Upper Nigeria, are, in my opinion, absolutely the same 

 as typical examples of T. cvar/orc from Arabia. This, it need hardly be said, will, 

 if true, prove to be a very interesting fact in geographical distribution. 



I have united T. yerburyi to T. evayore, following Dr. Butler ; l)ut it should be 

 noted that Mr. Guy Marshall considers that it is distinct and that 2\ swiiihoei is a 

 yellow variety. I am inclined to agree with him in this conclusion, but I cannot 

 follow him in the suppression of all the forms which he places under 7! cvnyorc. 



Dr. Butler observes in his latest revision of the genus: " T. yerburyi is the 

 wet-season form ; T. siciuhoei may be taken as either a yellow variety or an inter- 

 mediate type, and T. evayore (T. sa.rcus) is the dry-season form. Practically the 

 whole of the forms are dry-season, but they represent the seasonal phases which 

 occur in more variable climates. That 7! erayore is the dry-season phase of 'T. yerburyi 

 (and consequently 7'. heuyliui of y. thruppii and T. nouna of T. daira) is evident from 

 the fact recorded (P. Z. S. 1896, p. 247) that one pupa from a batch of larvje bred by 

 Capt. Nurse produced T. evayore (he calls it T. nouna, but that is a mere misidenti- 

 fication) and all the others T. yerburyi." 



Colonel Yerbury has sent me the following observations on T. yerburyi and 

 T. evayore. Of the former he writes: "Common inland. The larva feeds on a plant, 

 possibly Cadiiba indica, but it has not been identified. They are plumbeous, faintly 



