is^4.] 93 



almost as much reason a third might be introduced — Dadopor^a, Thorns., 

 to include E. decemguttnta and E. diffusa ; other species, however, 

 come exceedingly close to one another, and it is almost impossible to 

 distinguish them, except by comparing them with authentic types : all 

 the species are more or less testaceous or reddish in colour, and the 

 males have a distinct extra abdominal segment. E. silacea is the 

 largest (2 lin.), but it is hard to say which is the smallest, as some of 

 the species {e. g., E. cestiva, E. deleta, and E. ohsoleta) vary in size in 



lia remarkable degree ; this is especially noticeable in a large picked 



' series, such as that of Mr. Eye, whose whole collection of this genus 

 has been very kindly lent me by Mr. Mason, together with those of 



, Mr. Wilkinson, and others in his possession. The species live under 

 bark, at flowing sap, and in flowers, and to a certain extent they may 



; be separated by their habitat ; this point, however, must not be 

 pressed too far, as the flower-frequenting species {e. g., E.florea) are 

 (pceasionally found at sap. 



' Although no division of this genus has been found that is quite 

 satisfactory, yet the following hints concerning some of the chief 

 points of difference between the species may be of some practical use. 



[. TibifiB widely dilated at base ; intermediate coxse almost contiguous ; hind femora 

 in male either furnished with a blunt tooth or thickened (Dadopora, Thomson). 



U. decemguttata, Fabr. — Eather a large species, distinguished at once by its 

 contour, which is oblong-ovate, its colour, and its thick legs ; the thorax has light 

 margins, with the disc more or less dark : the elytra are dark, except the margins, 



. which are very plain, and five testaceous spots on each, three on the margin, a long 

 Dne at apex, and one behind the middle ; occasionally they are confluent : the male 



'": lias the posterior tibise excised at apex, and the posterior femora are armed with a 

 olunt tooth or projection. Length, 1| — 2 lin. 



Found at sap of oaks, &c., but is usually connected with the bur- 

 ■ows of Cossus ligniperda. Dunham Park, near Manchester, New 



i Forest, Shirley, Addington, Birdbrook, Sherwood Forest, Swansea ; a 

 'ery local species. 



E. diffusa, Brisout. — This species, which was separated by M. Charles Brisout 

 le Barneville (Grenier, Catalogue des Coleopteres de France, 1863, p. 46), is very 



■ ike the preceding, but it is a great deal smaller, and the spots on the elytra are not 



It, learly as well marked, and sometimes are so confluent that the elytra appear almost 



mtirely testaceous ; the elytra are somewhat more acuminate at the extremity than 



B the case with the preceding species, but this is not a marked character. In the 



SOJ Inale the posterior tibiae and femora are rarely more than thickened. 



, " Length, li lin. 



It is a question whether^this is anything more than a small variety 

 'A the preceding species ; the only structural character that gives it 



