1908.] NATURAL SCIENCES OF PHILADELPHIA. 623 



formibus; palpis plus minusve elongatis {sed palpis maxillaribus pro- 

 hoscidem non formantibus) totis nigris, albo-pubescentibus; labro albo- 

 villoso; thorace luteo, lata, sparsim punctulato; elytris dense punctulatis; 

 nigro-sybpubescentibus. Pectus et pubes nigra, albo-sericea; pedes 

 postici valde elongati. 



Long. Corp. 9 mm. 



Lat. elytr. 4 mm. 



Hab. Chiyaka, Angola (Africa) ; ab auctore collecta. 



Typ. in coll. mea. 



Small, elegant species; head and thorax broad, rather coarsely and 

 sparsely punctured, with pale microscopic hairs. Antennce filiform, 

 first three joints of about equal length. Scutellurn very finely punc- 

 tulate. Elytra more finely and closely punctured than head and thorax. 

 Breast and abdomen very feebly punctulate, covered with short fine, 

 pale hairs; femora with similar hairs; tibiae and tarsi with coarse short 

 black hairs, thickly set. 



One specimen taken in November, 1907. The specific name is a 

 local Bantu word meaning beautiful. 



99. Zonitis (N .) scapularis Mars. , Jom. Sci. Math. Phys. Nat. Lisb., VII, No. XXV, 1879, p. 67. 



Angola (Welwitsch). 



Genus DERIDEA Westw., Trans. Ent. Soc. Lond., 1875, p. 226. 



? Iselma Haag.-Rut., Deutsch. Ent. Zeit., XXIII, 2, 1879, p. 401. 



Westwood in founding this genus referred it with an interrogation 

 to the Helopida}, remarking in his diagnosis " unguibus-simplicibus." 

 Fairmaire also {Ann. Soc. Ent. Fr., 1891, p. 265) says of " Doridea (sic) 

 Westw." that while it "rappelle au premier bord, certaines especes 

 du genre Nemognatha," still "il en differe par les crochets des tarses 

 simples." Thomas {Ann. Mag. Nat. Hist., 1897, p. 389) has pointed 

 out that the claws are divided. The only properly generic character 

 given by Haag-Rutenberg for his genus Iselma is that the claws are 

 non-pectinated, and this character is shared by Deridea. The diag- 

 noses of both genera come very near to Zonitis, with the exception of 

 this important character, and I am inclined at present to sink Iselma 

 as a synonym of Deridea, which (I am convinced by an examination 

 of the type at Oxford and a series of specimens in the British Museum) 

 should be regarded as a good genus belonging by virtue of most of its 

 characters to the Zonitis group, but aberrant by reason of its non- 

 pectinated claws. 



