502 Mr. G. Meade- Waldo's revision of the species of 



The type locality of L. bisuturalis is doubtful, but it is 

 thought to have come from Senegal, which is highly prob- 

 able, as many Ethiopian species are now known. The 

 species is stated (I.e.) to have two transverse sutures on 

 the first abdominal segment, but the most careful examina- 

 tion has failed to reveal more than one. A specimen 

 in the British Museum from N.E. Rhodesia (Mid-Luangwa 

 Valley) is very closely allied to it. 



Labus difformis (Sauss.). 



Odynerus difformis, Sauss. Et. fam. Vesp. i, p. 145 (1852) (^. 

 I have not seen this species, but it appears to be a 



Labus. 



Subgenus Lionotus, Sauss. 

 0. (Lionotus) carinatus, sp. n. (Plate XCI, fig. 7.) 



$. Niger, luteo variegatus ; clypeo duabus carinis longitudinalibus 

 conspicue instructis; mesothorace crassissime ac longitiidinaliter 

 striate ; tergite secundo carina longitiidinali margineque postico 

 crenulato ; pronoti margine postico elevato. Clypeo basi, carinis 

 clypealibus, pronoto partim, segmentis abdominalibus 1 et 2 fasciis- 

 que apicalibus, luteis. Mandibulis, scapo, flagello infra, tegulis, 

 linea scutellari, segmento primo partim, pedibusque plerumque, 

 ferrugineis. Alis subfuscis. Long. 10 mm. 



(J differt clypeo luteo inconspicue carinato, areaque lutea pronoto 

 ampliori. Long. 9 mm. 



Head and thorax (except pleurae) covered with a medium fulvous 

 pubescence, pleurae with silvery pubescence. Mandibles long and 

 slender; clypeus rather longer than broad, narrowly produced to- 

 wards apex, shallowly emarginate, the area between the two carinae 

 shining almost impunctate. Pronotum truncate anteriorly, widening 

 towards tegulae, lateral angles acute; scutellum with the lateral 

 expansions rather inconspicuous, postscutellum with two sharp 

 lateral tubercles ; median segment concave, sides of the truncation 

 forming ridges. First abdominal segment slender basally, second 

 tergite with a conspicuous median longitudinal carina almost 

 reacliing the apex; apex crenulated impunctate. 



Head and thorax coarsely punctured, mesonotum especially with 

 conspicuous longitudinal striation, surface of the truncation of the 

 median segment more finely punctured. Wings fuscous. 



<J differs from $ in having the carinae on clypeus less distinct 

 and the yellow on pronotum more widely distributed. 



Length 9-10 mm. 1 ^J, 1 ?. 



