84 Mr. II. St. J. K. Donistliorpe on 



It will thus be seen that I have been unable to detect any 

 species belonging to the other two subfamilies — Dorylinae and 

 Myrmicinae. As no species of the former subfamily occur in 

 the Baltic amber, their absence is not surprising here ; but 

 that no species of the latter are present is very curious. 



There are also some thirteen specimens of whose genera I am 

 doubtful (some being only fragments), but in any case they do 

 not belong with certainty to the two subfamilies just mentioned. 

 Those are numbered :— I. 8676, I. 8683, I. 8723, I. 8759, 

 I. 9520, I. 9624, I. 9695, I. 10129, I. 10209, I. 10211 ; 

 Id. 17074 ; H. 127, and H. 334. Of these doubtful species 

 I sent drawings of the six most distinct specimens to my 

 friend Pivf. Wheeler, and he has very kindly returned them 

 to me with suggestions as follows : — (a. 18) I. 9695 Caf- 

 au'acus?, ? ; I. 10211 JJo/ichode>us? (Hi/podinea?), ? ; 

 I. 10209 Liometopum ?, ? ; In. 17074 Liometopum?, ? ; 

 H. 127 Liometopum?, ? ; H. 334 Camponotus?, § . 



I do not propose to describe or figure these specimens, for 

 the excellent reasons given by Wheeler. He writes {in lift., 

 10th Dec, 1919) :—^ln the case of the Florissant fossils I 

 shall not bother to describe or figure any specimens which are 

 not quite clear. I pursued this course with the Baltic amber 

 ants, of which I saw many that were indecipherable. If one 

 actually refers obscure fossils to a particular genus without 

 a query, they are dragged through the literature, and often 

 produce great confusion later by giving the impression that 

 certain genera were present in certain formations." 



Subfamily Ponebinae, Le Peletier. 



Tribe ECTATOMMINI, Emery. 



Genus Syntaphus, nov. 

 (avvra<pos f buried in the same grave.) 



Diagnosis. An Ectatommine with a spine on the epinotum. 

 Genotype. S. wheeleri. 



Syntaphus wheeleri, sp. n. 



There are three pieces of rock which carry this species ; 

 two of them [I. 8744, I. 9936] exhibit the same specimen 

 bisected by the splitting of the block, and show the head, 

 thorax, and gaster, two legs, part of both antennae, and a 

 trace of the wings. On the third block [I. 9325] only the 

 head, thorax, and half of the fore wing are present (PI. V. 

 fig. 2). The head is pointed at the posterior coiners and the 



