The Ants of the Baltic Amber. 31 



Black; the chitin of the body more or less decomposed. Wings 

 dark brown. 



Described from one rather poor worker specimen from the Klebs 

 Coll., K 5793, which, however, shows very clearly the palpi and the 

 sculpture of the sides of the body, three good worker specimens from 

 the collection of the Geolog. Inst. Koenigsberg, No. IV, 7, 8094/702, 

 and two without numbers. One of the latter (the ergatotype) is the 

 largest of the series and has ocelli and the promesonotal ridge described 

 above; the other lacks the head. The numbered specimen also has 

 ocelli. We may infer, therefore, that in this primitive genus there 

 was a tendency to produce ergatoid females like those we find today 

 in various species of Cerapachys (C. peringueyi) and Sphindoynyrmex 

 (S. hedivigce). The series comprises two males, B 5471 and II B 225, 

 both in the collection of the Geol. Inst.; the former very poor, the 

 latter (androtype) beautifully preserved and represented in Fig. 2 c. 



Frocerapachys favosus, sp. no v. 



Worker (Fig. 3). Length 6 mm. 

 Closely resembling the preceding species in form but differing 

 in sculpture. The head, thorax, petiole and postpetiole are coarsely 

 reticulate-rugose, the head and postpetiole less sharply and distinctly than 



Fig. 3. Frocerapachys favosus sp. nov. Worker, B 18239. 



the thorax and petiole, and in addition finely and densely punctate. 

 On the thorax the sculpture stops behind at a ridge bordering the 

 smooth and abrupt dechvity of the epinotum and anteriorly at the 

 transverse pronotal ridge. The neck is smooth and shining, at least 

 in the mid-dorsal region. The sculpture of the gaster cannot- be 

 determined as the segments are obscured by small bubbles and a white 

 film. Ocelli are present. The sides of the thorax and petiole are 

 flatter than in anno-nis, but the shape of the head, antennae and legs, 



