440 ARKIV FÖR ZOOLOGI. BAND 1. 



S. (Cyphonyx) nigricornis Tullgr. n. sp. (Pl. 23, fig. 5 a, b). 



Mdle. — Black; the legs yellow-brown with the femorse 

 dar k fuscous towards the base. At the base of the joints of 

 the posterior tarsi narrow black wings. The wings dark 

 fuscous, darkest towards the base, with a brilliant violet 

 effnlgence. 



The hairs on the body very long, black, on the legs very 

 short, yellowish. 



The clypeus comparatively convex, broad with the upper 

 margin strongly arcuate, the lower one nearly straightly 

 truncated in the middle. The labrum rounded at the apex, 

 not ernarginated in the middle. The eyes touch the base of 

 the mandibulse. The longest interval between the eyes on 

 the vertex as long as the length of the 1st •+ the 2d joint of 

 the flagellum. The interval between the two posterior ocelli 

 not half as long as the distance from the eyes. 



The pronotum very convex at the shoulders, with the 

 posterior margin curved. The scutellum and the postscutel- 

 lum forms a little conical projection in the middle. The me- 

 dian segment about as long as broad with very fine trans- 

 verse wrinkles above. 



The second cubital cell smaller than the third one and 

 the anterior margin of the former shortest. 



The anterior tarsi not ciliated on the outside. The legs 

 with short and fine spines. The longest spur of the poste- 

 rior tibia about as long as a fourth of the metatarsus. The 

 claws deeply bind. 



Length 14.5 mm. Exp. 34 mm. 



A single male from Itoki ( 8 /2 1891). 



This species is very similar to S. abyssinicus Gribodo 

 and S. Bretoni Guér. From S. Bretoni Gruér. l it differs prin- 

 cipally by having black antennas and reddish legs. The third 

 cubital cell by S. Bretonii Guér. >presque de moitié moins 

 large en haut>, by my species the anterior margin is about 

 9 /a of the breadth in length. To S. abyssinicus Grrib. 2 it 

 seems to be much more similar. But that species is larger, 

 the male has the two last joints of the legs fuscous and the 



1 Griiérin, Description de quelques espéces inédites d'hyménoptéres fouis- 

 senrs de 1'ancien continent. Mag. de zoologie 1843. 



2 Gribodo. Ann. Mus. Civ. di Genova. 1879. p. 343 and 1881, p. 246. 



