154 LAMELLICOENIA. 



4. Pseudoserica integrata. (Tab. IX. fig. 18.) 



Oblongo-ovata ; <$ purpureo-fusca, opaca, 5 eastaneo-fusca, interdum aenescens, nitida ; setulis inclinatis 

 separatis vestita, elytris setulis longioribus sparsis fasciculoque apud callum apicale ; capite grosse con- 

 fluenter punctato, olypeo perparum sinuato, labro medio usque ad clypei marginem excavato; thoraee et 

 elytris J discrete punctulatis, $ grossius subconfluenter punctatis, apud thoracem <$ punetis e punctulis 

 minoribus compositis ; corpore subtus pygidioque umbilicato-punctatis, metasterno medio breviore, polito ; 

 tarsis posticis articulo basali mediocriter elongato, quam 2° et 3° conjunctis paullo longiore ; pedibus rufes- 

 centibus. Antennae rufo-testaceae, 9-articulatae, clava S valde elongata. Tibiae anticae d 1 $ bidentatae. 



Long. 8 millim. 



Hob. Panama, Bugaba {Champion) . Numerous examples. 



Subfam. DIPLOTAXINM. 



This group is distinguished from the " Macrodactylinae " (with which it agrees in the 

 free labrum and abdominal segments and in the conical, obliquely exsertecl, anterior 

 coxa?) by the nearly equal lengths of the ventral segments 2—5. Species in which the 

 fifth ventral segment is a little the largest are found in Liogenys only, which is thus 

 shown to be a connecting-link with the "Macrodactylinae." The obliteration of the 

 suture between the fifth ventral and the penultimate dorsal segment, adduced as a dis- 

 tinguishing character by Leconte, holds good with American genera, although there is 

 a trace of a suture in some examples (not in others) of Liogenys palpalis *. In all, the 

 thorax in front has a membranous margin, and the elytra a very narrow similar margin. 



punctulatis vix costulatis ; corpore subtus pygidioque annulato-punctatis ; tarsis subtus dense pilosis, 

 posticis articulo basali tribus sequentibus conjunctis fere aequali ; tibiis anticis 3-dentatis ; antennis (10- 

 articulatis) pedib usque rufo-testaceis. 

 Long. 8-11 millim. 

 Hah. Amazons, ubique. 



The additional antennal joint, the fifth, is very small. The species differs from the equally 10-jointed 

 P. flavoMrta, Blanch., which is apparently still more widely distributed in Equatorial South America, by its 

 smaller size (P. flavoMrta being 12 to 14 millim.) and the finer and much less dense sculpture; both differ 

 from P. setisparsa in the numerous long erect hairs (scattered partly in lines on the elytra and forming a 

 rather dense brush on the thorax), which rise far above the short reddish-tawny subrecumbent pile. In 

 P. amazonica and P. flavoMrta the first joint of the hindmost tarsi is equal in length to joints 2-4, and about 

 double the length of the second ; in the following species it is still longer absolutely and relatively :— 



Pseudoserica longitarsis. 



Inter P. flavohirtam et P. amazonicam; ambobus differt thoraee densissime (haud confluenter) punctato, elytro- 

 rum setis et pilis magis cinereis tarsisque posticis articulo basali longissimo, caeteris 4 conjunctis fere 

 eequali : capite thoraceque viridi- vel cupreo-aeneis ; caetera sicut in P. amazonica. 

 Long. 12-13 millim. 

 Hah. Upper Amazons. 



* The obliteration of the suture is not peculiar to the Diplotaxinse ; it is seen in some Macrodactylinae, e. g. 

 Ancistrosoma. 



