298 HYMENOPTERA. 



mesofhorax above, the sides of the metathorax, on the femora 

 behind, and on the tibiae outside ; the tarsi ferruginous ; the 

 spines on the tibiae and tarsi pale testaceous; wings hyahne, 

 the nervures and tegulae pale ferruginous. Abdomen ferruginous, 

 the three apical segments black, covered with fine silvery pile ; 

 the apical margins of the segments with silvery fasciae, those on 

 the third, fourth and fifth broad, nearly covering the segment ; 

 the sides of the apical segment carinate, the segment clothed 

 above with golden pubescence. 



Hab. India. (Coll. F. Smith.) 



11. Tachytes fervidus. 



Female. Length 5a lines. — Head and thorax black, and covered 

 with short golden pubescence ; the antennae, anterior margin of 

 the clypeus, and the mandibles, ferruginous ; the flagellum fus- 

 cous above, and the mandibles rufo-piceous at their apex. The 

 wings hyaline, the nervures and tegulnc pale ferruginous ; the 

 legs ferruginous, the anterior and intermediate coxae more or less 

 fuscous. Abdomen ferruginous, thinly covered with changeable 

 short golden down, the margins of the segments with golden 

 bands, which in different lights have a tessellated appearance ; 

 in some individuals the fourth segment is slightly fuscous. 



Hab. India. (Coll. F. Smith.) 



Sect. 2. Abdomen black. 



12. Tachytes nitidulus. B.M. 



Crabro nitidulus, Fabr. Ent. Syst. ii. 294. 6 ; Syst. Piez. 309. 7. 



Hab. India (Madras ; Punjaub) ; Sumatra ; Celebes. 



The male of this species is covered with silvery pubescence, 

 the fasciae ou the abdomen being very bright and widened 

 laterally ; the anterior tarsi rufo-testaceous. 



13. Tachytes monetarius. B.M. 



Female. Length 6-8 lines. — Black : the face, outer orbit of 

 the eyes, and base of the mandibles covered with bright silvery 

 pubescence ; the vertex and the thorax covered with a thin short 

 cinereous pubescence ; the legs have a similar clothing ; the tibire 

 outside have a bright silvery pubescence; the calcaria, spines 

 and claws ferruginous ; wings subhyaline, the anterior pair fus- 

 cous towards their base, darkest at their anterior margins, the 

 apical margins of the wings with a narrow fuscous cloud. Abdo- 

 men densely clothed with short rich golden pubescence, which in 



