120 GEO. n. HORN, M. D. 



Ligula either broad and large (Scarites) or small and prolonged (Clivinse) the tip 

 narrow and bisetose, except in Pasimachus in which it is but little prominent at 

 middle and with the two setse very closely approximated, paraglossse usually 

 slender and longer than the ligula, spinulose within in the Scarites. Palpi moder- 

 ate, terminal joint variable in form, shorter than the penultimate (Scarites) equal or 

 longer (Clivinse), the penultimate bisetose in front (Clivinise) plurisetose (Scarites). 

 Thorax variable in form, hind angles rarely prominent, side margin with a setiger- 

 ous puncture in the hind angle (Scarites) or with two lateral punctures (Clivinse). 

 Body pedunculate, scutellum not visible between the elytra. Elytra rarely slightly 

 margined at base, sides narrowly inflexed margin entire except in Ardistomis 

 where there is a distinct interruption posteriorly and an internal plica. Prosternura 

 not prolonged behind the coxae, the cavities closed behind. Mesosternum vertical, 

 not carinate in front. Metasternal epimera not visible in Pasimachus, more or less 

 distinct in all the other genera. Posterior coxse contiguous. Legs stout more or 

 less fossorial, the anterior femora especially stout. Middle and posterior tibiae 

 ciliate or spinulose externally but often very finely, anterior tibise palmate the 

 outer apical angle prolonged, inner side deeply emarginate with the inner spur 

 above the emargination. Tarsi slender. 



From the above characters it is evident that the tribe must be sub- 

 divided into two groups in the following manner : 



Basal joint of antennae long. Mentum broad, concealing at the sides the base of 

 the maxillae. Head with one supra-orbital setigerous puncture, thorax with 



one setigerous puncture at the hind angle Scarites. 



Basal joint of antennae not elongated.. Base of maxillae not covered by the 

 mentum. Head with two supra-orbital setigerous punctures, sides of thorax 



with two Clivin^. 



In addition to the above characters the form of the labial palpi and 

 the paraglossEe give additional means of separating the groups. 



The sexual characters of the genera of this tribe are very feeble. 

 In Scarites the last ventral segment has four marginal punctures, 

 in the female the inner two are more distant from each other than 

 from the outer, while in the male they are equidistant. In Pasi- 

 machus some species have the posterior tibiae pubescent within at tip 

 in the male. There are no marginal punctures on the last ventral 

 segment, in the males there will usually be observed on each side one 

 ante-apical puncture and in the females two, but these are not constant 

 in any respect. 



In the Clivinae the last segment is the same as in Scarites, the 

 tarsi are often alike slender in both sexes but when dilated are 

 more so in the male. In DyscMrius the palpi differ as will be seen 

 below. 



The antennse vary in the number of glabrous basal joints, the Scarites 

 have four and the Clivinae two. In Aspidoglossa the base of third is 

 glabrous but even here as in all the Clivinse the second joint though not 

 pubescent is hairy. 



