52 



journal R. A. s. (ceylon). [Vol. III. 



and strong smell from the anus. I have often handled the 

 other two species but observed nothing of the kind. 



No. V. 



The TuiGONOToMiDiE with an elliptic terminal joint of the 

 palpi are abundantly represented amongst the Ceylon Cara- 

 bidce, thus making amends for the want of other tribes of the 

 section to which they belong. I have now before me a great 

 many individuals of different species which I have endea- 

 voured to distribute into genera after the works of Lacor- 

 daire, Dejean and others of less importance. 



A single glance almost convinced me that they must belong 

 either to Abacetus, Distrigus, or Drimostoma — genera closely 

 allied, and whose principal, (in fact only essential), distinction 

 would appear to reside in the shape of the mentum-tooth. If 

 it is a well established fact, which cannot be doubted, from the 

 above authors, that this tooth is pointed in Drimostoma, — large, 

 rounded, equalling the lateral lobes in Abacetus, — -and large and 

 truncated in Distrigus, — the species described below could not, 

 as to their genera, be distributed otherwise than I have done, 

 namely, five Distrigi and one Drimostoma. The species which I 

 have drawn to the former genus have a large, more or less square 

 tooth, slightly rounded at the anterior angles. It is impos- 

 sible to call this tooth of the five species pointed in any way ; 

 they cannot therefore belong to the genus Drimostoma ; nor can 

 any of them be drawn to Abacetus, which genus is moreover 

 apparently exclusively African, As to the insect which I 



^^Barysomus Gyllenhali Dej. A gross oversight of the vesture of 

 the anter. malo tarsi and some incorrect information regarding the 

 insect I received from Europe led me into the error of describing it as 

 new in the first edition of these papers. However, having since 

 examined it more closely, I may mention here that joints 2-4 only of 

 the anterior male tarsi are furnished with squamulae below, and not 

 joints 1-4, as stated by other authors. 



