in the British Museum. 457 



(type now designated E. lavateri, Heer, from Oeningen), 

 seems applicable to the present insect. I include in 

 Elaterites, however, various Elaterid elytra from the Tertiary, 

 which cannot he definitely assigned to known genera. Those 

 described below, if completely known, would very likely be 

 found to include as many genera as species. 



Elaterites perditulus, sp. n. (PI. XVI. fig. 7.) 



Elytron about 10"3 mm. long, width about 2 mm. ; eight 

 rcnvs of fine punctures, about the middle four rows in 1 mm. 

 transversely ; punctures in the rows about 130-160 /x apart, 

 and jjlaced in delicate grooves. The general form is that of 

 Monocrepidiiis ; the apex is too pointed for Athous. 



Corfe, I. of Purbeck, Dorset {Brodie). Brit. Museum, 

 10418. 



This is labelled " Agrilus, Buprestidse (W.)." W. probably 

 stands for Westwood, but in spite of this high authority tlie 

 insect must be referred to the Eiateridse. 



Elaterites laconoides, sp. u. (PI. XVI. fig. 8 ; text-fig. 1.) 



Elytron 7 mm. long and 2'5 mm. broad, formed much as 

 in Lacon, the apex very obtuse. Ten striae, bearing five 

 round (not elongate) punctures ; near the humeral angle 

 the second stria (counting from without) is deflected toward 

 the third at its upper end, and in the space thus formed 

 between the first stria and upper end of second is a little 



Fig.l. 



; • 



• • f 



Elaterites laconoides (■sculpture). 



row of four j)unctures. On the basal half of the elytron tlie 

 punctures are very distinct, but on the apical part they are 

 small and obscure. On the basal part the ))unctures are 

 about six in a mm., and there are three striai to a mm. 

 transversely. 



Bartonian, Bagshot Beds ; Bournemouth, near the pier. 

 Presented by Alfred Bell. Brit. Museum. 1891)8. 



