PHILANTHUS. 185 



4. Mimesa unicolor. 



M. atra, leviter griseo-pubescens ; clypeo gibboso, facie argenteo- 

 pubescente ; metathorace reticulato-rugoso. 



Psen unicolor, Fan d. Lind. Obs. ii. 105. 3. 

 Mimesa unicolor, Shuck. Foss. Hym. 231. 3. 



Wesm. Hym. Foss. Belg. 108. 1. 

 Mimesa borealis, Dahlb. Hym. Europ. i. 2. 2. 

 Pemphredon unicolor, Curtis, Brit. Ent. xiv. t. 632 # . 



Female. Length 3| lines. Black and shining; the head and 

 disk of the thorax punctured; the face covered with silvery 

 pubescence ; a carina runs from the anterior stemma down the 

 face, and terminates a transverse one which crosses at the 

 insertion of the antennae; the clypeus convex, its anterior 

 margin reflexed, in the middle slightly emarginate ; the tips of 

 the mandibles ferruginous; the antennae obscurely fulvous 

 beneath towards their apex. Thorax : the metathorax reticu- 

 lated ; the scutellum smooth and shining, with a few scattered 

 fine punctures ; wings as in the preceding species, but with the 

 third submarginal cell longer. Abdomen smooth, shining, and 

 covered, except the first segment, with silky pubescence ; the 

 petiole linear, carinated above ; the apical segment with a 

 broad flat triangular space above, which is covered with coarse 

 longitudinal punctures. 



The Male has the face more densely covered with silvery pubes- 

 cence, the antennae longer, the tarsi rufo-testaceous, and the 

 abdomen with an upcurved pale ferruginous spine. 



Not uncommon, and widely distributed ; once very plentiful, 

 entering the straws of a thatched outhouse at Charlton, Kent. 



Fam. 8. Philanthidse. 



Philanthidae, Dahlb. Hym. Europ. i. 187 (1843-5). 

 Cerceridae, Wesm. Hym. Foss. Belg. 98 (1852). 



The head wider than the thorax ; the intermediate tibiae armed 

 with a single spur at their apex ; the legs with the anterior tarsi 

 strongly ciliated. 



Genus 1. PHILANTHUS. 



Vespa, pt., Fabr. Syst. Ent. p. 362 (1775). 

 Crabro, pt., Rossi, Mant. i. 138 (1792). 

 Philanthus, pt, Fabr. Ent. Syst. ii. 288 (1793). 

 Simblephilus, Jurine, Hym. 185 (1807). 



