10 . K. Takaliashi. 



the Imse; the 5th very slightly iinlii-ieated, the apical sensoria very 

 small: the relative length of joints as follows: 111-50. IV-3], 

 V-2iS. VI-GO (12 + 4.S). liostnuu nearly reaching the middle coxae. 

 Prothorax with a small tubercle on each side, which is not pointed. 



Cornicles cylindrical, long and slender, not reaching the caudal 

 apex; reticulated on their apical portion and expanded at their bases. 

 Cauda ensiform, with o 'pairs of long bristles. 



Length of hodv — 2.0 mm. Antenna — 1.8 mm. 

 Cornicle — 0.4 mm. 



Closely related to 31. miscanthi Tak., from which it is readily 

 distinguished by the smaller body. 



Host. — Alopeculus sp. Collected by Mr. M. Maki. 



Distriliution. — Formosa (Taihoku). 



Macrosiphum pisi (Kalt.) 



Aphis pisi, Kaltenbach, .Mono. PHanz., p. 23(1843). 



Siphonophora pisi. Koch, Die Pflanz. , p. 190, pi. xxxv, figs. 

 261-262 (1857): Buckton. .Mun. Brit. Aphid, i, p. 134, pi. xiv 

 (1S75): Thomas, Bull. 2, Illinois St. Lab. Nat. Hist. p. 8 (1878); 

 Oestland, Geol. Nat. Hist. Survey Minnesota, p. 25 (1886). 



Nectarophora pisi, Oestland, Bull. 4, Geol. Nat. Hist. Survey 

 Minnesota, p. 82 (1887): Sanderson, Canad. Ent. xxxiii, p. 31 

 (1901): Essig, Pomona .11. Kntom. ii, ]>. 33(; (1910). 



Nectarophora deslructor, Johnson, Canad. Ent. xxxii, p. 56 

 (1900). 



J/acrosiphum pisi. Sanborn, Ean.sis Univ. Sc. Bull, iii, No. 1, p. 

 79. pi. XV. fig. 80 (1904): Gillette, .h.ur. Ecoii. Entom. iv, p. 384 

 (r.Mlj: Theobald, .luur. Econ. Piol. viii, p. 134, fig. 43 (1913) and 

 Bull. Em. liesearch, vi. p. 105(1915): Davis, U.S. Dept. Agr. Bull. 

 27(; (191.5): vanderOoot, Beitriige Kenntniss Holland. Blatll. p. 85 

 (P915); Maki, Agr. Expi. St. Formosa, Bull. 103 (1916): van der 

 Goot, r,.ntrib. Fauna hides Neerland. i, iii, p. 15(1917): Matsu- 



