990 COLEOPTERA 



regulav striae ; the interstices of these a Httle transversely waved on 

 the apical portion. The male has one, the female two, setae on each 

 side of the hind margin of the last ventral segment. The sexes diiTer 

 a good deal in the elytral sculpture, as mentioned above. 



Picton. Helms ; a good series of nearly twenty examples. 



1779. Z. achilles, n.s. (Shari) ; Trans. Boy. Dub. Soc, 1886, p. 

 367.) Niger, supra fusco-seneus, iwothorace cupreo-aurato, antennis 

 pedibusque piceis ; elytris elongatis, sat profunde striatis, striis vix 

 perspicue punctatis, interstitiis convexis, postice transversim subim- 

 pressis. 



Long., 21-23mm. 



Mas, tibiis posterioribus apice calcare robusto apice rotundato- 

 hamato armatis ; tarsis articulo basale intus dilatato. 



Thorax strongly transverse, the sides rounded, a good deal nar- 

 rowed behind ; the basal impressions large ; the hind angles rect- 

 angular, slightly obtuse ; the surface coppery, about the foveae 

 more golden. 



This species is closely allied to Z . calcaratus, but, so far as the 

 male is concerned, can be readily distinguished by the form of the 

 basal joint of the hind tarsus, and by the broader less acuminate 

 prolongation of the tibia ; it has, too, the basal portion of the thorax 

 shorter, and the elytra more elongate and oblong, and these two 

 latter characters will probably permit the discrimination of the 

 females. The latter sex I do not know, but probably it will be 

 extremely similar to Z. calcaratus ? . 



Picton. Helms ; two male examples. 



Obs. — These two species of Dr. Sharp's are closely related to my 

 species Nos. 1330 and 1457. These latter must become ZcopcBcilus 

 imtus (No. 1330) and Z. prince'ps (No. 1457) ; the name opulentus 

 having been used for an Australian Notonomus, ininccps is substi- 

 tuted. 



Z. putus is distinguished from Dr. Sharp's two species by the 

 laterally-compressed basal joint of the hind tarsus, which is, more- 

 over, broadly grooved underneath. In Z . 2^rincei]s the same joint is 

 also compressed, but in such a way as to form a sort of ridge along 

 its lower surface. In both these species (Nos. 1330 and 1457) the 

 interstices of the elytra are somewhat uneven or undulate behind. 



The genus Holcaspis is now abandoned, because of the un- 

 reliable character by which Baron Chaudoir proposed to distinguish it 

 from Pterosticlius. 



Dr. Sharp considers the number of tactile seta3 on the sides of 

 the thorax a better distinction, and indicates three groups, without, 

 however, giving names to them. 



After a careful inspection of all the specimens in my collection, I 

 think it advisable to place the species in four groups, according to 

 the following list, under the older name {Pterosticlius). 



This arrangement is not altogether satisfactory, as the allies of 

 Trichosternus, which must remain under the name Pterosticlius, are 

 not sufficiently distinguished as a series or group from one section 



