March, 1920.] XoTMAN : LeGS IN THE CaRABID.E. 85 



margin, producing an emargination therein. In these genera and 

 all the genera in which this emargination is strong, the posterior spur 

 is found some distance above the apex: in Thalpiiis pygmcciis near 

 the middle; in Dyschirius tridentatus nearer the base than the apex. 

 In the remarkable genus Metritis, however, the posterior spur is 

 terminal, although the groove is curved into the lateral margin and 

 produces an emargination therein; and on the other hand, in Omo- 

 phron, although the groove is straight as in the Cychrini, the poste- 

 rior spur occupies a strongly ante-apical position. In Pasimachiis 

 the groove is replaced by a hemispherical excavation, which cuts the 

 lateral margin close to the apex, between the base of the tarsi and 

 the posterior spur, which is slightly ante-apical. In Scarites the 

 excavation becomes an oblique transverse groove cutting both lateral 

 margins of the joint. In this form it is found throughout the sub- 

 family Harpalinae. 



The tibise are always thicker at the apex than at the base; some- 

 times only slightly so as in Omophron or Brachynus; sometimes 

 suddenly thicker at the apex as in the Scaritini, the genus Ptero- 

 sticlms, or the Dapti. The anterior pair are always thicker and 

 shorter than the posterior. 



Although the anterior pair are often strikingly modified with 

 teeth and apical prolongations, as in the Scaritini and Dapti, the 

 intermediate tibise in the majority of the genera are the most strongly 

 modified with secondary sculptural ornamentation in the form of 

 grooves, carinas and spines. 



In the intermediate and posterior tibiae, some traces of a row of 

 spines on each side, often accompanied by a distinct carination, is 

 always found, excepting possibly in Casnonia, Ziiphium, Thalpius, 

 Ega and Brachynus. On the exterior faces of these tibise is rarely 

 found a simple longitudinal groove, stronger on the intermediate, as 

 in Leistus ferrugineus. In Nehria ovipennis and mefallica this 

 groove is found on the intermediate tibiae only, and is open at the 

 apex. In Platymts rcflcxus a weak groove is found on the inter- 

 mediate tibiae only; it is placed near the middle; in the closely related 

 Platynus brunneomarginatns intermediate and posterior tibiae are 

 both grooved, the groove extending nearly to the apex. In Callida 

 viridipcintis there are weak grooves near the apex on both pairs of 

 tibiae. The grooves are most strongly developed in /'/(7/_vH».y/»"t'&nV. 



