The Auts of the Baltic Amber. ]23 



XXB 832, XXB 83, XXB 518 etc.) and 19 in the Klebs Coll. (K 908, 

 K 945, K 821, K 4784, K 4465 K 4054, K 818, K 5089, « 39, « 190, 

 a 189, « 203, K 6430, « 202, « 184 etc.) 



Lasius punctulattis Mayk. 



Lasius pundulatus Mayr, Beitr. Naturk. Preuss. I, 18(58, p. 4U, Taf. II, Fig. 34. 9: 

 Dalla Torre, Catalog. Hymen. VII, 1893, p. 190; Erx. Andre, Bull. 

 Soc. Zool. France, XX, 189.J, p. 82; Handlirscii, Fo.*s In,sekt. 1908, p. 801 • 



This species is known only from the female, which, on super- 

 ficial examination, as Mayr observed, would be regarded as the hitherto 

 unknown female of L. jyianihis on account of its size (3 — 3,8 mm), but 

 for the fact that all the funicular joints are longer than broad. I have 

 not seen the type specimen which Mayr cites as existing in the Geolog. 

 Inst. Koenigsberg Coll., but 4 winged specimens in this collection 

 (B 5098, B 19161 and 2 without numbers) and two winged and two 

 dealated specimens in the Klebs Coll. (K 5079, K 4046, K 927 and 

 K 5083) agree perfectly in size and in the structure of the antenna^ 

 with Mayr's description. In all the winged individuals the discal cell 

 of the fore wing is small. 



Lasius nentorivagiis, sp. nov. 



Female (dealated). Length 6 mm. 



Differing from the female of L. schiefferdcckeri in its larger head, 

 which is broader than the thorax. The palpi are shaped like those 

 of L. schiefferdeckeri^ but the body is much more thickset, the legs and 

 antennae are much stouter, joints 2—6 of the funiculi are broader 

 than long and joints 7 — 10 not longer than broad. The petiolar 

 node is rather broad, anteroposteriorly compressed, with a blunt, entire 

 superior border. In L. schie/ferdeckeri this border is emarginate and 

 sharper. The surface of the body is shining and finely punctate; 

 the head, thorax, gaster and coxae are beset with sparse, erect hairs. 

 The color is dark brown, the appendages somewhat paler. 



Described from a single specimen (without a number) in the 

 Geolog. Inst. Koenigsberg Coll. 



Except for the structure of the palpi, this female would be re- 

 garded as closely related to the recent L. nmhratiis Nyl., which it 

 very closely resembles in the shape of the head and body. It may, 

 in fact, be the precursor of L.iunbratiis^ which we must suppose to have 

 arisen from just such a form, with the terminal joints of the maxillary 

 palpi unabbreviated. 



