286 



lIALTIClN'vE. 



Larger insects ; antennae stout, 

 second and third segments of equal 

 thickness 25. 



25. Third and fourth segments of antennae 



almost equal to each other in length . 26. 

 Fourth segment distinctly longer than 

 third 27. 



26. Ante-basal transverse impression on 



pronotum shallow Phygasia, Baly, p. 412. 



Ante-basal impression deep Haltica, Fabr., p. 418. 



27. Ante-basal impression on pronotum 



very close to the basal margin, not 

 bounded on either side by a short 



longitudinal impression Paulina, Motsch., p. 424. 



Ante-basal impression bounded on 

 either side by a short longitudinal 



impression Lactica, Erichs., p. 426. 



Two genera, viz., Mniophila , Stephens (p. 428), and Argojaus, 

 Fischer (p. 429), containing insects of doubtful position from our 

 regions, are not included in the above key. 



Genus PSEUDAPHTHONA, Jacohy. 

 Pseudaphthona, Jac, Ann. Soc. Ent. Belg. xlvii, 1903, p. 104. 

 Genotype, Pseudaphthona humeralis, Jtic. 



Body oblong. Antenna) thickened towards the apex. Palpi 

 robust. Prothoraoo subquadrate, without ante-basal sulcus, the 

 anterior angles oblique. Elytra irregularly punctured, and having 

 an oblique longitudinal humeral ridge. Prosternum twice as long 

 as broad, longitudinally sulcate ; anterior coxal cavities open. 



Fig. 104. — Pseudaphthona humeralis, Jac. ; part of prothorax and 

 elytron, to show the humeral ridge of the latter. 



Tibise dilated in front, sulcate, the anterior and intermediate pairs 

 unarmed, the posterior with a spine. Posterior femora thickened. 

 Claws appendiculate. 



Allied to Aphthona, but separated by the unarmed anterior 

 tibia?, which are also distinctly dilated, and by the elongate and 

 sulcate prosternum. The following species cannot be referred to 

 Weise's genus Luperomorpha, in which the second and third seg- 

 ments of the antennas are extremely small and the elytra finely 



