PHILANTHUS TRIANGULUM. 187 



1. Philanthus trianguhrni. 



P. niger ; capite thoraceque flavo-pictis ; abdomine flavo, seg- 

 mentis macula dorsali triangular! nigra ; alls flavo-hyalinis. 



Vespa triangulura, Fabr. Syst. Ent. 372. 49 ? , & Cab. Mus. Dom. 

 Banks. 



Vitters, Entom. iii. 276. 25. 



Christ. Hym. p. 136. 



Oliv. Encycl. Meth. vi. 693. 116. 

 Vespa limbata, Oliv. Encycl. Meth. vi. 693. 118. 

 Crabro androgynus, Rossi, Faun. Etrus. Mant. i. 138. 305. 

 Philanthus pictus, Panz. Faun. Germ. 43. 23 $ . 



Fabr. Syst. Piez. 362. 

 Philanthus apivorus, Latr. Fourm. 317. 1. 12. f. 2. 



Spin. Ins. Lig. i. 95. 1. 



Philanthus discolor, Panz. Faun. Germ. 63. 18 #. 

 Philanthus triangulum, Fabr. Ent. Syst. ii. 289. 2; Syst. Piez. 

 302. 4. 



Dumeril. Consid. t. 59. f. 6, 7. 



Van d. Lind. Obs. ii. 122. 2. 



Shuck. Foss. Hym. 246. 1. 



Dahlb. Hym.Europ. i. 187. 115. 



St. Farg. Hym. iii. 342. 



Wesm. Hym. Foss. Belg. 105. 6. 

 Simblephilus diadema, Jurine, Hym. t. 10. gen. 18 ?. 

 Philanthus androgynus, Curtis, Brit. Ent. vi. t. 273 ? . 



Female. Length 6J-7i lines. Head and thorax black and 

 shining; the head very closely punctured, the disk of the 

 thorax much more distantly so ; the face, clypeus, and a bifur- 

 cate spot above, yellowish white ; the mandibles ferruginous, 

 with their tips nigro-piceous ; the flagellum obscurely fulvous 

 beneath, with the apical joint brightly so ; the head fulvous 

 behind. Thorax : the collar, a spot on the tubercles and on 

 the tegulae in front, and the post-scutellum, yellowish white ; 

 the wings fulvo-hyaline, the nervures ferruginous; the legs 

 yellow, with the coxae, trochanters, and base of the femora 

 black ; the anterior tarsi strongly ciliated outside, and all the 

 tibise spinose. Abdomen yellow, the extreme base of the seg- 

 ments and a triangular spot in the centre of each, black, the 

 spots decreasing in size from the basal one. 



Male. Length 4-6^ lines. It differs in having the spot above 

 the clypeus trifurcate ; it has also a yellow stripe behind the 

 eyes ; the legs are of a pale yellow ; the abdomen black, with 

 a yellow band on the segments, which is very much attenuated 

 in the middle, the two apical segments yellow. 



Var. a. With a large yellow spot on the scutellum and a yellow 



