1908.] NATURAL SCIENCES OF PHILADELPHIA. 615 



Type in my collection; cotype Cat. No. 12126, U. S. N. M. 

 Three specimens taken at Gamba, on flowers of Tribulus zegheri, 

 March, 1908. 



The type of tristigma is in Berlin, Konigliches Museum. 



54. Mylabris (M.) tristriguttata Mars., Jom. Sci. Math. Phys. Nat. Lisb., VII, No. XXV, 



1879, p. 55. 

 Mylabris " ristriguttata" Mars., Champion, Soc. Ent. Belg. Ann., XLIII, 

 1899, p. 165 (ex error). 



Loanda (Welwitsch). 



Subgenus CEROCTIS Mars. 



55. Mylabris (C.) amphibia Mars., M^m. Soc. roy. Sci. Li^ge, 1872, p. 559, pi. V, fig. 70o. 



Angola (Marseul). 



56. Mylabris (C.) angolensis Gemm., Col. Hefte, VI, 1870, p. 123. 



Mylabris phalerata Erichs., Wiegm. Arch. Naturg., I, 1843, p. 256. 



Angola (Erichson), Angola (Welwitsch). 



Type in Berlin, Konighches Museum, marked "Angola Schonh." 



57. Mylabris (C.) bohemanni Mars., M^m. Soc. roy. Sci. Liege, 1872, p. 198, pi. V, fig. 69. 



Capangombe (Anchieta). 

 Described from "Caffraria." 



58. Mylabris (C.) exolamationis Mars., ibid., p. 562, pi. V, fig. 72a. 



"Amberix" (= ? Ambriz) (Marseul), Bengo (Welwitsch), Gamba, 

 March, 1908, on flowers of Tribulus zegheri, 16 specimens (Wellman). 



59. Mylabris (C.) interna Har., Mitth. Munch. Ent. Ver., 1878, p. 108. 



Angola (Welwitsch) (a specimen in the British Museum labeled 

 as Coryna lata Reiche), Angola (Mechow), Pungo Andongo, end of 

 July (PoGGE and Hohmeyer), Chiyaka, 1 specimen on grass December, 

 1906, 1 specimen on Geigeria wellmani September, 1907, 20 other 

 specimens on Compositse chiefly Geigeria and Othonnaspp. (Wellman). 



Described from the interior of "Guinea" and placed by its author 

 in the genus Bruchus. C. vespina Thos. (Ann. Mag. Nat. Hist., 6, 

 XIX, p. 501) from east Africa has been sunk as a synonym of the 

 species under discussion, but a series of 40 specimens from the Congo, 

 now in the United States National Museum, together with my own 

 examples, show that vespina, the type of which is in the British Museum, 

 should be retained as a distinct and stable variety of interna, the front 

 brown fascia of the latter being quite constantly reduced to two dots 

 in the former. In the description vespina is not compared with 

 interna but with yerhuryi Gahan, from which it differs not especially 

 (as is stated by Thomas) in the elytral banding, but in the color and 

 structure of the antennae (the type of vespina has no antennae) which 

 are very different. 



