LIST OF HOMOPTEROUS INSECTS. 1067 



10. Pemphigus Americanus. 



Nigra^ alho lanuginosa; alls subcinereis^ stigmate et venis nigro- 

 fuscis. 



A little smaller and more slender than P. BumelicB ; brand 

 darker than that of P. Xylostei ; distinguished from both species 

 by its darker veins. Black, covered with white cotton-like matter : 

 wings slightly gray ; brand and veins dark brown. Length of the 

 body 1 line ; of the wings 4 lines. 



a — d. Nova Scotia. From Lieut. Redman's collection. 



II. Pemphigus GLOBosus, 



Pallide viridis,globosa^ pollinosa ; thorax in alato obscurus. 



Pale green, short, broad, almost globose, thickly covered with 

 white powder: feelers short: rib-vein diverging much from the fore 

 border beneath the brand, converging more abruptly to it beyond 

 the base of the fourth vein ; first and second veins united at the base, 

 diverging much from thence to the tips ; third vein simple, wanting 

 for one-third of the length from the base, nearer to the second at the 

 tip than the second is to the first ; fourth slightly curved near the 

 base, straight from thence to the lip, as near to the third vein as to 

 the tip of the rib-vein. From the roots of the Scarlet Runner, in 

 November. 



a — r. England. (In Canada Balsam). From Mr. Walker's collec- 

 tion. 



12. Pemphigus? Pistacij;. 



Aphis Pistaciae, Linn. Syst. Nat. ii. 737, 33. Fabr. Sp. Ins. ii. 389, 

 42. Mant. Ins. ii. 317, 47. Ent. Sgst. iv.219, 48. Si/st. Rhyn. 

 301, 48. Gmel. Ed. Syst. Nat. i. 14, 2209, 33. SimL Vit. 

 Ges. 49. Camer. Epit. 51. Lob. Icon. 100. Dodon. Pempt. 

 780. Bauh. Hist. i. 279. Theodr. Hist. 1439. Reaum. Hist. 

 Nat. Ins. iii. 281, 350, pi. 24, f. 6, pi. 25, f. 1—3. Rossi, Favn. 

 Etrusc. 264, 1399. Hofmann, Edl. von Hofmannsthal {Die 

 Caruba di Guidea), 1842. Kirby ^ Spence, Intr. Ent. i. 451. 

 Fonscol. Ann. Soc. Ent. Fr. x. 192, 34. Kalt. Mon. Pfnn. 

 140, 108. Ferussae, Nouv. Bull. Sci. iii. Bull. Soc. Phil. 

 1812, 1813. 



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