438 Mr. I’. Smith on the Synonymy of the genus Nomada. 
N. ruficornis ; the distinguishing characteristic of the male, the first 
joint of the antenne yellow in front, and one-third of the joints 
black behind, distinguishes the male of ruficornis; 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 ruficornis, which is 
by far the most abundant species in the neighbourhood of London. 
Sp. 9. ruficornis, Linn. 
Nomada ruficornis, 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. n. 498. 29; 
Smith, Zool. vol. ii. 596. 9; Nylander, Mon. Ap. Boreali, p. 180. 
Apis ruficornis, 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. tom. ii. p. 381. 18; Kirby, Mon. Ap. Angl. vol. ii. p. 210. 27. 
Nomada conjungens, Schaffer, no. 8 (male and fem.). 
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 Trimmerana, tibialis, and 
nigro-aenea. 
Sp. 10. armata, Schiffer. 
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. 1. 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, Schiffer, Germ. Zeits. vol. i. pt. 2. 280. 12. 
On examining a long series of N. lateralis, male, | 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. 18. ochrostoma, Kirby. 
Nomada ochrostoma, Schiffer, 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 
