438 Mr. F. Smith on the Synonymy of the genus Nomada. 



N. ruficomis ; the distinguishing characteristic of the male, the first 

 joint of the antennae yellow in front, and one-third of the joints 

 black behind, distinguishes the male of ruficomis ; and the female, 

 distinguished by having the entire region of the eyes red, and the 

 yellow spots on the third and fourth segment of the abdomen di- 

 stinct, are usual characteristics of the female of ruficomis, which is 

 by far the most abundant species in the neighbourhood of London. 



Sp 9. ruficomis, Linn. 



Nomada ruficomis, Fab. Ent. Syst. Em. n. 7 ; Syst. Piez. 390. 2 ; 



Panz. Fn. Ins. Germ. Init. no. 55. tab. 18 ; Schaffer, Germ. Zeits. 



vol. i. pt. 2. 279. 9; St. Farg. Hist. Nat. Ins. vol. ii. 498. 29 ; 



Smith, Zool. vol. ii. 596. 9 ; Nylander, Mon. Ap. Boreali, p. 180. 

 Apis ruficomis, Linn. Syst. Nat. Gmel. p. 2795. 34; Syst. Nat. ed. 12. 



n. 34 ; Fn. Suec. 1707 ; Vill. Ent. Eur. 3. n. 27 ; Geoffr. Hist. Ins. 



Par. torn. ii. p. 381. 18; Kirby, Mon. Ap. Angl. vol. ii. p. 210. 27. 

 Nomada conjungens, Schaffer, no. 8 (male and fern.). 

 Nomada flava, Panz. 53. 31 (male); Fabr. Syst. Piez. 391. 4; Kirby, 



vol. ii. 186. 8 ; Schaffer, no. 18. 

 Apis leucophthalma, Kirby, vol. ii. 197. 16. 



Probably the most variable species of the genus, particularly the 

 male. This insect is parasitic upon Andrena Trimmer ana, tibialis, and 

 nigro-cenea. 



Sp. 10. armata, Schaffer. 



Nomada armata, Schaffer, Germ. Zeits. vol. i. pt. 2. 279. 10; Smith, 



Append. Zool. vol. vii. p. 41. 



This species I have described in the ' Zoologist ' ; it has hitherto 

 only been taken twice in this country in Devonshire. I have seen 

 examples from Nova Scotia, and also from Albania. 



Sp. 11. rostrata, Schaffer. 



Nomada rostrata, Schaffer, Germ. Zeits. vol. i. pt. 2. 280. 11. 



This species I think is without doubt the male of Kirby 's A. flavo- 

 guttata. 



Sp. 12. melanostoma, Schaffer. 



Nomada melanostoma, Schaffer, Germ. Zeits. vol. i. pt. 2. 280. 12. 



On examining a long series of N. lateralis, male, 1 feel satisfied 

 that this is only one of its varieties ; small specimens have sometimes 

 the labrum black as well as the clypeus, and the scutellum is black 

 in nearly all the males which I have seen ; these peculiarities are only 

 variations to which the species is subject. 



Sp. 13. ochrostoma, Kirby. 



Nomada ochrostoma, Schaffer, Germ. Zeits. vol. i. pt. 2. 280. 13 ; 



Zetterst. Ins. Lapon. p. 470. 2; Smith, Zool. vol. ii. 596. 9 (male). 

 Nomada vidua, Smith, Zool. vol. ii. 602. 18 (female) ; Nylander, 



Mon. Ap. Boreali, p. 179. 

 Apis Hillana, Kirby, vol. ii. 208. 25 (var. male). 



This species is closely allied to N. lateralis, the males of the spe- 

 cies most closely resembling ; but the abdomen of ochrostoma is more 



