1906.] Wheeler, The A Jits of Japan. 3^7 



Female (dealated). Length 3-3.75 mm. 



Resembling the worker. The thorax is robust, flattened and rather shining 

 above; the mesonotum and scuteUum regularly longitudinally rugose, the latter 

 smoother behind. Epinotum and pedicel opaque, very coarsely rugose; 

 epinotal spines short and blunt. Color like that of the worker except that the 

 thorax is almost black. 



Described from three females and numerous workers collected by 

 Mr. Hans Sauter at Takakiyama, Kanagawa and Yamanaka, Suruga. 

 F. Smith's types of this species were from Hiogo. 



24. Leptothorax congruus F. Smith var. spinosior Forel. 



FoREL, Ann. Soc. Ent. Belg., XLV, 1901, p. 371, § 



According to Forel this variety, of which he obtained specimens 

 from Sapporo, Yezo, has the epinotal spines "long and curved inward, 

 as long as the basal epinotal surface and longer than their interval, 

 reddish at their tips. " Four workers and a dealated female collected 

 by Hans Sauter at Yamanaka at an altitude of 900 ft. agree with 

 Forel's description. They are all smaller and much paler in coloration 

 than the corresponding phases of the typical congruus above described 

 The epinotal spines diverge but are bent downwards at their tips. 

 Forel calls attention to the similarity of this variety to the European 

 L. tiiberiini Fabr. 



2^. Tetramorium caespitum Linn. 



Forel (Bull. Soc. Ent. Suisse, X, 7, 1900, p. 268) mentions two 

 varieties of this common European ant from Osaka, "one paler and 

 smaller, the other black and larger." Among my specimens two 

 workers collected by Professor J. F. Abbott near the Marine Bio- 

 logical Laboratory at Misaki belong to the large, dark form. Six 

 others collected by Mr. Hans Sauter at Kanagawa are decidedly 

 smaller but of the same dark color. 



26. Pristomyrmex japonicus Forel. 



(Plate XLI, Fig. 7.) 



Forel, Bull. Soc. Ent. Suisse, X, 7, 1900, pp. 268, 269, § 

 Forel, Ann. Soc. Ent. Belg., XLV, 1901, p. 371. 



The types of this species are from Osaka, but Forel mentions its 

 occurrence also at Sapporo, Yezo. Twelve workers collected by 

 Professor J. F. Abbott near the Marine Biological Laboratory at 



