1908.] NATURAL SCIENCES OF PHILADELPHIA. 621 



Subgenus 1. ZONITIS Fabr.. loc. cit., p. 126 (sens. sir.). 

 Subgenus 2. NEMOGNATHA lUig. Mag. Ins., VI, 1807, p. 333. 



Leptopalpus Guer., Icon. Ins., p. 136. 

 Subgenus 3. GNATHIUM Kirby, Trans. Linn. Soc. Lond., XII, p. 425. 



I propose to follow Casey {Ann. N. Y. Acad. Sci., VI, 1891, p. 170) 

 in treating Nemognatha and Gnathium under Zonitis. This will necessi- 

 tate changes in synonymy (principally of the American species) which 

 need not be entered into at this time. The elongated outer lobe of the 

 maxillae is the only real character separating the two first mentioned 

 groups from Zonitis proper, and this character fails in several American 

 species and also in the new species of Nemognatha described in the 

 present paper. The differences between Nemognatha and Gnathium 

 are even slighter, the antennal and thoracic characters often leaving 

 one in doubt as to which group an insect should go. Nevertheless the 

 divisions are useful to a certain extent and I do not follow Casey in 

 sinking the names entirely, but suggest that they both be considered 

 as subspecies of Zonitis. 



The following artificial table shows how the main characters run 

 through the three groups of the genus : 



..4. — Palpi not elongated. 



Antennae not thickened at tips, . . Zonitis {sens. str.). 



A A. — Palpi elongated, the maxillary palpi often forming a sucking 



proboscis. 



a. — Antennae not thickened at tips, . . . Nemognatha. 



aa. — ^Antennae thickened at tips, Gnathium. 



Subgenus ZONITIS Fabr. {sens. str.). 

 93. Zonitis (Z.) antennalis Wellm. spec. nov. 



Gracilis, lutea; antennce, pectiis et pedes {tibiis exceptis) nigra; capite 

 prothoraceque valde elongatis, angustis, subtiliter punctulatis, hoc tri- 

 impresso {impressionihus hand profundis); antennis fortiter serratis; 

 palpis nigris, apice oblique truncatis. Elytra dense subtiliter punctata, 

 submedio nigro-fasciata. Pectus, pedes et abdomen pallido-sericea. 



Long. corp. 12 mm. 



Lat. elytr. 4^ mm. 



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



Typ. in coll. mea. 



A striking species both from its form and coloration. Luteous except 

 the mouth parts, antennae, breast and legs which are black, the tibiae 

 having the upper portion also luteous. Head and thorax long and 

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