378 Annals of the South African Museum. 



SlLSILA VARIEGATA, Sp. 11OV. 



<$ only. A slender and testaceous species with profuse black 

 markings, and only the face, clypeus, palpi, frontal orbits and seventh 

 segment substramineous. Head otherwise deep black with the frons 

 closely punctate and a simple cariua between the scrobes ; face and 

 clypeus equally closely punctate, the latter apically rounded and 

 neither margined nor impressed ; mandibles not short, margined 

 below and basally pale, their apical teeth normal and of equal length. 

 Antennae black and gradually attenuate throughout, extending to apex 

 of basal segment. Thorax cylindrical and slender, finely punctate ; 

 black with the pronotum, callosity before radices, a central mesonotal 

 mark at base of the deep but not crenulate notauli, and whole nieta- 

 thorax testaceous ; sternauli crenulate, inflexed and entire ; metathorax 

 scabrous, gradually declived throughout the bitranscariuate with the 

 apical carina deeply emarginate centrally ; spiracles elongate, apophyses 

 and basal area wanting. Scutelluni and frenum testaceous, the 

 former long and laterally margined to near its apex. Abdomen sub- 

 linear, very slender with the basal two-thirds of second segment and 

 whole of the fourth to sixth, with the elongate ventral valvulae, black ; 

 basal segment linear and elongate, subsulcate discally before its 

 glabrous apex ; thyridii small, circular and remote from base of the 

 elongate second segment. Legs long ; hind ones with the tarsi, coxae 

 except a discal mark, base of trochanters, femora except basally 

 beneath, and both extremities of the tibiae, black. Wings hyaline and 

 broad, with stigma and uervures black ; basal nervure continuous, 

 areolet quadrate and very small, emitting recurrent from its centre ; 

 nervellus intercepted at its centre. Length, 11 mm. This is not a 

 true member of the present genus, which has the lower mandibular 

 tooth much the smaller ; but in all the essential characters and in its 

 elongate facies it agrees sufficiently to allow of a position here until 

 the opposite sex be discovered. 



The type is from D'TJrban in Natal, where Bell Marley discovered it 

 011 February 8th, 1915. 



SUBTRIBK CEYPTINI. 



OSPKHYNCHOTUS, Spinola. 



Gruc'r. Magaz. de Zool. xi, 1841, p. 45. 



Distantella, Saussure, Nat. in Transvaal, 1892, p. 229. 



Essential Characters. Apical metathoracic transcariua entire ; 

 spiracles elongate ; mouth rostriform, with cheeks strongly elongate ; 



