I03 



Die Bienen Afrikas nach dem Stande unserer heutigen Kenntnisse. 



185 



at the base. 3 following joints transverse and of equal Icngth, 5 apical ones ratiier longer, of equal length, apex 

 of the apical Joint pointed; labrum transverse, anterior margin rounded; mentum rather longer than the labium, 

 former acute at its apex, the latter blunt or rounded; labial palpi 4-jointed, 2 basal joints stout and of equal 

 length, 2 apical ones shorter and much more slender, paraglossae about the same length as the palpi ; maxillary 

 palpi 6-jointed, 3 basal joints stout and of equal length, 3 apical joints much more slender and each in succession 

 shorter than the preceding; ocelli placed in a curve on the Vertex. Thorax: large and ovate, anterior wings 

 with one marginal and 2 submarginal cells, 2. receiving both the recurvent nervures; legs with the femora broad 

 and compressed; calcaria at the apex of the intermediate tibiae stout, acute and bent at the apex, its hinder 

 margin toothed like a fine comb, the inner spin of the posterior calcaria toothed in a similar manner, teeth much 

 longer, thosc at the base of the spine longest, decreasing in length to the apex; posterior tibiae and basal Joint 

 of the tarsi densely covered with long hair, claws of the tarsi bifid. Abdomen subovate, tiamcated at the base. 



Maerojns verwandt etc. infolge des Flügelgeäder und der Mundteile. 



The beautiful comb with which the posterior tibiae are furnished is doubtless for the purpose of rcmoving 

 the grains of pollen collected on the hairs which clothed the shanks (Plate i, details)." 



Systematische Uebersicht der Arten von Scrapter. 

 I. Gruppe nigrotestaceus : 



I. Scraptcr nigrotestaceus Magr. 



2. Gruppe alholimhatus : 



2. Serapter alholimhatus Magr. 



3. „ armatus Magr. 



4. Gruppe striatus: 



10. Serapter striatus Sm. 



11. „ sjöstedti Friese 



12. „ lactipennis Friese. 



5. Gruppe terminalis: 



13. Serapter terminalis Sm. 



14. „ apicalis Sm. j Reg. 



15. „ chalyhaeus Sm. j orient. 



Bestimmungstabelle der Arten von Serapter (nach Vachal). 



j Abdomen schwarz 2. 



I ■! Abdomen bläulich oder blaugrün 6. 



^ Abdomen gelblich, Kopf und Thorax schwarz, L. 6 mm Ser. nigrotestaceus. 



I Clypeus 5 unbewehrt , 3- 



1 Clypeus $ jederseits mit Hörn bewehrt, Birma Ser. cornutus Grib. 



( ? 4- 



M <? 5. 



