602 PROCEEDINGS OF THE ACADEMY OF [Dec, 



and the adjustment of life to environment very delicate. Other notes 

 on the habits of the various species need not be discussed here, but will 

 be found with the mention of the various species. 



Following is a list of the species occurring in Angola, so far as I have 

 been able to verify the records. When I have had occasion to compare 

 material with original types I have usually indicated where such types 

 are to be found. It may be mentioned that in the records and sjai- 

 onymy all names from Dejean's Catalogue have been ignored, as have 

 MS. names, since the recognition of such serves only to perpetuate 

 confusion. A set of cotypes (with the exception of three uniques) 

 of the new forms described in this paper has been deposited in the 

 collection of the United States National Museum. Probably a few of 

 the species now included under Mylabris (sens, str.), and of which I 

 have been unable to trace the types, will later have to be distributed 

 among the various subgenera which I have recognized. 



Fam. MELOID^. 



Siibfam. LYTTIN-E. 



Tribe MYLABRINI. 



Genus MYLABRIS Fabr.,Syst. Ent., 1775, p. 261. 



Subgenus 1. ACTENODIA Cast., Hist, des Ins., II, 1840, p. 268. 



Syn. Actenoda Erichs., Wiegm. Arch., IX, 3, 1843, p. 257 (? ex error). 

 Syn. Arithmema Chevr., Ic. Regn. anim., Ill, p. 384. 



Subgenus 2. CORYNA Billb., Mon. Mylabr., 1813, p. 73, nota. 



Syn. Hycleus Latr., Regn. anim., Ed. I., 1817, p. 314. 



Subgenus 3. DECAPOTOMA Voigts, Wien. Ent. Zeit., XXI, p. 177. 



Syn. Decatoma Cast., Hist, des Ins., II, 1840, p. 268 (nee Spinola). 



Subgenus 4. MYLABRIS Fabr., Syst. Ent., 1775, p. 261 (sens, strict.). 



Subgenus 5. CEROCTIS Mars., Abeille, VII, 2, 1870, p. 168. 



Syn. Mimesthes Mars., Mem. Soc. Sci. Liege, 1872, p. 566. 



Subgenus 6. LYDOCERAS Mars., Abeille, VII, 2, 1870, p. 12. 



The following artificial table based on the antennal characters may 

 be useful in separating these subgenera of Mylabris: 



A. — Antennae wdth from eight to eleven joints, last joints inflated 

 into a club-shaped mass. 

 a. — Antennae moniliform. 



Antennae eight-jointed, Actenodia. 



Antennae nine-jointed, Coryn.x. 



Antennae ten-jointed, Decapotoma. 



Antennae eleven-jointed, Mylabris (s. str.). 



aa. — Antennae serrate. 



Antennae eleven-jointed, Ceroctis. 



A A. — Antennae with eleven joints, last joints not inflated. 



Antennae somewhat flattened, Lydoceras 



