On neio Stapliylinidje /V(9??i the West Indies. o63 



XLT. — Descriptions of new Species of Staphylinidse froin 

 the West Indies. By Malcolm Cameron, M.B., 11. N., 

 F.E.S. 



Part II. 



[Concluded from vol. Lx. 1922, p. 652.] 



IMyredoniini. 



PseudothamiariEa, gen. nov. 



Tarsi 4, 5, 5 : the anterior pair with the first three joints 

 short and eqnal, the fourth as long as the three preceding 

 together ; middle pair with the first four joints rather short, 

 equal ; posterior pair with the first joint a little longer than 

 tlie second, the second to the fourth of equal length. Epi- 

 pleur?e of the protliorax not visible to side view. Mesosternum 

 gradually narrowed to the rounded apex, and extending two- 

 thirds of the length of the intermediate coxee (which are 

 rather widely separated), and furnished with a median keel 

 throughout its whole extent. Metasternal process truncate, 

 meeting the preceding. Temples strongly bordered through- 

 out. Maxillary palpi 4-jointed : the first small ; the second 

 elongate, lightly thickened towards the apex ; the third as 

 long as the second and similarly thickened; the fourth 

 long, subulate, more than half as long as the third. Labial 

 palpi 2- jointed (indistinctly 3-jointed): the first joint rather 

 long and stout, w^ith an oblique suture passing from the 

 inner border at the level of the junction of the second and 

 last thirds forwards and outwards_, imperfectly defining 

 another joint ; second joint narrower and a little shorter 

 than the first. Tongue narrow and elongate, extending as 

 far as the level of the apex of the first joint of the labial 

 palpi, and split for one-fourth of its length into two narrow 

 diverging lobes, the apex of each carrying a long seta 

 curved backwards and the external margin with two similar 

 setae ; the inner margin before the apex with two weaker, 

 shorter, and straight setae. 



'J'he species on which this genus is founded might be 

 taken for a broad and robust Atheta of the Acrotona group, 

 but in the structure of the labial palpi approximates to 

 Thamiaroia ; the tongue, however, is quite difi:erent, and 

 remarkable in the long curved setse which it carries. 



24^ 



