Further notes on " Jurinean " Genera of Hymenoptera. 441 



genres Acanthomyops Mayr, Dendrolasius Ruszky et 

 Chthonolasius Ruszky, dont le dernier est a mon avis 

 synonyme de Lasius s. str. et ne pouvait etre maintenu. 

 Done, suivant mon opinion, la synonymie doit etre la 

 suivante, si Morrice et Durrant ont raison : — 



Genre Acanthomyops Mayr (1862) 



= Lasius F. 1804 (non Jurine 1801) 



= Donisthorpea Morrice et Durrant; 



Type : claviger Roger, 



Subgen. Chthonolasius Ruszky, type : niger L. (flavus 



ex. Ruszky). 

 Subgen. Dendrolasius Ruszky, type : fuliginosus Latr. 



P.S. — M. Emery m'ecrit qu'a son avis il vaudrait mieux 

 prendre pour Lasius le nom nouvellement deterre par 

 Wheeler de Formicina Shuck., nom en partie base sur le 

 Lasius flavus. Je n'ai rien a y opposer, pourvu qu'on en 

 finisse une bonne fois avec ces demenagements perpetuels 

 des anciens noms." 



We do not quite understand the process by which niger 

 is to be constituted the Type of Chthonolasius Ruzsky, 

 in lieu of flava L., indicated as the Type by Ruzsky, nor 

 do we accept the suggestion that Formicina Shuck, should 

 be used in lieu of Donisthorpea. The following is the 

 original reference to Formicina Shuckard : — " The group 

 has been divided according to the structure of the abdo- 

 men ; which in some has but one node only to its peduncle, 

 but in others it has two. It is in the first division that 

 we find the stingless genera, namely, Formica Linn., For- 

 micina Shkd., Polyergus Latr., Polyrachis Shkd., and 

 Dolichoderus Lund, besides several other yet uncharacter- 

 ised genera, which we shall shortly publish. 



(155). The Formicina rufa, or horse ant, forms those 

 large nests of dry leaves and sticks we so frequently ob- 

 serve in the woods; and within these nests two genera of 

 Staphylini appear to be parasitical — Lomechusa and Fella; 

 and in their deepest recesses innumerable wood-lice (Onisci) 

 are constantly found." ..." Another singular Staphy- 

 linus (the minute Claviger), which is totally blind, and 

 otherwise remarkable in structure, inhabits the nests of 

 the Formicina flava, where it has once been discovered in 

 this country." (Shuckard, Lardner's Cabinet Cycl. 10. 

 (Hist. & Nat-Arr. Ins.) 172 (1840.)] 



TRANS. ENT. SOC. LOND. 1916. — PARTS III, IV. (June '17.) G G 



