THE ENTOMOLOGIST. 337 



rufiventris of Wesmael and Sichel, and iiiost probably tlie 

 Tiphia nifiventris of Panzer. I have therefore adopted the 

 latter name for the species. Kirby describes the autenna3 of 

 the male of tliis species as " submoniliformes, thorace bre- 

 viores :" tills is a character that distinguishes from the male 

 of the true S. gibbus, which he has described under the 

 names of" monilifbrmis and picea," in which the same organs 

 are described "thoracis longitudine, articulis arcuatis." The 

 species is equally common as the preceding, and frequents 

 the same Ilowers. 



3. Sphecodes sdbquadratus. 



Sphecodes gibbus, Westn. Ohs. Gen. SpJiec. 5. 



S. subquadratus, Stfiilh, Zool. iii. 1014; Beefi Great Brit. 

 18; Nyland. Revis. Ap. Boreal. 235; Sdtenck, Bees 

 Nassau ; Sichel, Mon. Gen. Sphec. 414. 



This species was first taken by Dr. Thwaites, near Bristol ; 

 subsequently I discovered a colony near London ; in 1865 

 I again, after an interval of sixteen years, found it plentifully 

 at Birch Wood, Kent. The quadrate form of the head will 

 serve to distinguish it from the other species. The males 

 very closely resemble those of S. gibbus, but their heads are 

 not so wide in proportion to the thorax, which is much 

 more closely punctured, as is also the head ; the antennae 

 are proportionably shorter, and tiie wings not so darkly 

 clouded. 



4. Sphecodes ephippius. 



Sphex ephippia, Linn. Faun. Suec. 944; Sysl. Nat. i. 



944, and Cab. Mus. Linn. Soc., male. 

 Melilta divisa, male, and M. GeofFrella, female, Kirbi/, 



Mon. Ap. Anf/l. 49 and 45. 

 Apicis minimus, Harris, Expos. Engl. Ins. 136, t. 39. 

 Sphecodes maculatus, St. Farg. Hym. ii. 545, male. 

 S. Geoffrellus, St. Farg. Hyni. ii. 544; Wesni. Ohs. Gen. 



Sphec. 7 ; Smith, Zool. iii. 1014 ; Nyland. Revis. Ap. 



Boreal. 194. 

 S. ephippius, Smith, Bees Great Brit. 19; Schenck, Bees 



Nassau. 

 This small insect has the head of the same form as that of 

 S. subquadrata; the examples of the males therefore closely 

 resemble those of S. subquadratus, but size alone will usually 



