Aleocharina.] sTArnYUNiDyE. 



9 



B. Palpi with tlie ordinary number of joints (niaxil- 

 l;iry palpi -l-joiiilcd, labial palpi ^-jointod) ; 

 internicdiat'^ coxaj with cavities not entirely 

 surrounded by a raised margin. 



a. First joint of posterior tarsi about ecjual in 



len-th to the last joint MlCHOOLOSSA, Kraatz. 



b. First joint of posterior tarsi much longer than 



the last joint, 

 a*. Hind body with the three first (apparent) 

 segments feebly impressed transversely at 

 base; hind body usually narrowed towards 



apex, 

 at- Labial paljii with joints gradually narrower OxTPODA, 3Iannh. 

 bf. Labial pilpi with the first two joints 



thickened TiiiASOPHILA, Kraatz. 



b*. Hind body with the three first segments 

 strongly impressed transversely at base, fourth 



feebly impressed ; hind body parallel-sided . IscuNOGLOSSA, Kraatz. 

 ii. Head slightly contracted at base ; border of thorax 

 moderately reflexed, plainly visible if viewed from 

 gije OcxusA, Kraatz. 



iii. Head strongly contracted at base, projecting laterally 

 beyond apex of the thorax. 



A. F'irst joint of posterior tarsi shorter than the two 

 following united, and than the last joint ; antenna} 



short PuLffiOPOEA, Kr. 



B, First joint of posterior tarsi more or less elongate, at 



least equal to the two following united, and not 

 shorter than the last joint ; antennse long. 



a. Last joint of maxillary palpi at least one-third as 



long as the penultimate OcALEA, Kr. 



b. Last joint of maxillary palpi minute, plainly less 



than one-third as long as the penultimate. 



a*. Mesosternum carinate Iltobates, Kraatz. 



b*. Mesosternum not carinate. 



at. Antennas with joints 2-3 equal CniLOPOEA, Kraatz. 



bt. Antcnnaj with second joint plainly longer 



than third CaloderA, Mannli. 



IL Labial palpi setiform Gymnusa, Er. 



HOiaaiUSA, Kraatz. 



This genus comprises three species (from Europe, North America, and 

 Japan), which are distinguished by having a broad convex thorax, which 

 is pLainly broader than the elytra, and by the hind body being strongly, 

 though gradually, narrowed from base to apex ; two species occur in 

 Europe, of which one is found in Britain ; it is usually taken in or near 

 decayetl trees in company with Furmica fuliginosa. 



H. acuminata, Maerk. Pitchy-red with the head and central 

 portion of hind body more or less dark, and the apex of hind body 

 rather broadly testaceous ; head much narrower than thorax ; anteniuu 

 stout and rather short, thickened towards apex, more or less dusky, with 

 the basal and apical joints lighter, tliird joint shorter than second, 5-10 



