HYMENOPrEROUS FAMILY STEPHANID^. 809 



Black ; head red except apices of mandibles and the occiput ; 

 4-5 basal antenual joints, pronotum laterally and beneath, a basal 

 band on third tergite, ventral surface of second sternite, all coxse 

 and legs red ; petiole basally, knees and middle metatarsi basally 

 white, hind coxfe and base of hind femora black. Wings hyaline, 

 stigma elongate, narrow lanceolate, brownish ; nervures dark 

 brown. 



Length 10 mm. ; abdomen 6 mm. ; petiole 3'5 mm. ; wings 

 3"5 mm. ; terebra 10"5 mm. 



Habitat : Cameroons. Oberlieutenant v. Rothkirch, German 

 Colonial Defence Foi'ce. 



A specimen in tlie Biitish Museum (M'Langa, Nyassaland, 

 S. A. Neave, 2. i. 1914) diifers from the above description only 

 in having a more red-brown petiole and second segment black. 



This species comes near D. szepligeiii Enderl. and D. gracilis 

 Kieff., but differs from both in size and sculpture. The number 

 of minor denticulations between the larger hind femoral teeth 

 appears to vary, but we do not possess sufficient details to decide 

 whether this is an individual or specific difference. 



11. PLAVIDENTATUS Enderl. 



Diastephanus Jlavidentatus Enderl. (3), p. 204, 5 ■ 



5 . Head i-ather small, globose. Neck strongly transrngose, 

 laterally more finely and closely, semiannular finely trans-striate, 

 apically more closely, posterior margin laterally rugose. Meso- 

 pleurte sparsely and coarsely punctate, posterior margin smooth, 

 upper third finely transrngose and yellow pubescent. Petiole 

 finely transrugose ; second segment dull, finely punctate and 

 basally indistinctly rugose. Terebra rather longer than body, 

 sheaths with broad yellow bai^d before apex. Hind femora 

 bidentate ; hind tibire and metatarsus yellow pubescent. 



Black ; face, cheeks, lateral borders of frons, and a median line 

 yellow ; antennae brown, basally paler. Anterior legs pale ferru- 

 ginous ; a streak on outside of basal fourth of front tibiae, basal 

 fourth of middle tibias and basal half of middle metatarsus yellow. 

 Hind legs black-brown, tarsi rufescent, femoral teeth yellowish. 

 Wings hyaline ; stigma pale yellow, nervures brown. 



Length 11|-14| mm.; petiole 4" 1-5* 2 mm.; terebra 13|- 

 15 mm. ; fore wing T-S^ mm. 



Habitat : Formosa, 1911 ; Kankau, 1912 ; Hoozan, 1910. 

 H. Sauter. Co-types in German Ent. Museum at Dahlen and 

 in Stettin Museum. 



Enderlein {I. c.) states that the only other species in this 

 subgenus having yellow femoral teeth are his D. maculifemVjT 

 and D. ruficoUis. The detailed descriptions state clearly that in 

 D. maculi/emicr both teeth a,re white, and in D. ruficoUis the 

 anterior tootli is yellow, the posterior black. The present species 

 differs from D. ruficoUis in the sheaths of terebra being yellow- 

 banded, hind tibipe pubescent, and both femoral teeth yellow; from 

 D. maculifemur in smaller head, longer terebra, and in the colour 

 of terebral sheaths and femoral teeth. 



