XANTIIOLINIDES. 27l 



Labriim bilobed ; ligula rounded, entire ; maxillary palpi 

 threadlike, last joint usually longer than third, gradually 

 j)ointed; labial palpi threadlike, joints gTaduaUy increasing 

 in length. Xantholinus, Dahl. 



h. Tarsi rather short. 



Labrum deeply emarginate ; ligula rounded, slightly 

 emarginate in middle ; maxillary palpi Avitli last joint 

 pointed, scarcely shorter, but much narrower than third ; 

 last joint of labial palpi rather longer, and much narrower 

 than second. Upper side marginal line of thorax continued 

 under shoulder, without uniting with lower one. 



Leptacinus, Er. 

 2?. Antennae only slightly elbowed. 



Head not furrowed ; upper side marginal line of thorax 

 running along whole of margin and not united with lower 

 one ; elytra with sutural margins not overlapping ; middle 

 coxae approximated ; anterior tarsi strongly dilated ; first 

 joint of hinder pairs of tarsi elongate. 



a. Elytra with a deeply impressed sutural stria. 

 Labrum emarginate in middle ; ligula rounded, entire ; 



last joint of maxillary palpi almost half as long again as 

 third joint ; gradually pointed from middle ; last joint of 

 labial palpi almost double as long as second (which is 

 about equal in length to first), gradually pointed from 

 middle. Head roundish quadrangular ; thorax oblong, 

 parallel-sided, with a pair of impressions in middle and 

 another pair in the anterior angles, nearer the anterior than 

 the side margin. Baj^tolinus, Kr. 



b. Elytra without any distinct sutural stria. 



Labrum with several slight emarginations and a deep 

 excision in middle ; ligula rounded, entire ; last joint of 

 maxillary palpi shorter and narrower than third, gradually 

 pointed ; last joint of labial palpi somewhat longer and 

 narrower than second, bluntly pointed. Head long-ovate ; 

 thorax oblong, with a pair of impressions between middle 

 and anterior margin, and another pair between middle and 

 posterior margin, nearer former, besides some punctures 

 near side margins. Othius, Leach. 



Xantholinns. 



A, Upper side marginal line of thorax running under 

 shoulder to anterior marginal line. 



