Latreille's essential difference between this genus and Hy- 

 lurgus is, that the former has 9-, the latter 8-jointed antennae; 

 they are however both 11-jointed, and I doubt very much the 

 necessity of separating them. In examining the antennas I 

 observed a transverse suture on the 11th joint as indicated in 

 the engraving, giving it the appearance of an additional joint; 

 and not having been able to discover a labrum, I am disposed 

 to believe that the trigonate lobe of the clypeus may supply 

 its place. 



These insects, like Scolytus, figured in plate 43, reside 

 under the bark of living trees, the beetles eating their way 

 through when they hatch: the following are natives of Britain. 



1. H. crenatus Fah. — Panz. 15. 7. — sulcatus Mars. 



I found several on an ash-tree the middle of June at Hen- 

 stead in Suffolk ; it is not uncommon in Norfolk and near 

 London in August : the Honourable C. A. Harris has met 

 with it in some abundance in a decayed ash-tree near Heron 

 Court, Hants; and Mr. Dale took a specimen near Sherborne. 



2. H. haemorrhoidalis Mars. — minutus Panz. 15. 11.? 

 Said to have been taken near London. 



S"*. H. picipennis Step. 



I observed this species in abundance under the bark of a 

 felled tree at Kirkstall Priory near Leeds, in July, but they 

 were all dead ; it has occurred also near London. 



3. H. scaber Mars. — Curt. Brit. Ent. pi. 522. 



First taken in Kensington Gardens, and afterwards by Mr. 

 A. Mathews in his garden at Turnham Green in July ; it has 

 also been found in Surrey. 



4. H. Fraxini Fab. — Panz. 66. 15. — varius Mars. — griseus 



and rufescens Mars. vais. 



Marsham seems to have described 2 varieties of this variable 

 insect, as distinct species. It inhabits the ash and is very 

 common in Norfolk on the bark of that tree, also on paling, 

 timber near saw-pits, &c. ; it usually flies in the sun in the 

 warm days of spring. 



The Cleoni/mus maculipennis {pi. 194.) is parasitic on this 

 species, as noticed in folio 507. 



5. H.furcatus Mars. p. 55. n. 13. 



Some suppose this to be also a small variety of the last. 



6. H. coadunatus Mars. 58. 20. 



Taken by Mr. Ingpen under the bark of rails near Sydenham. 



7. H. sericeus Mars. 55. 12. 



Found in the neighbourhood of London. 



For specimens of the Mountain Pink [Dianthus ca:sius) I 

 am indebted to John Queckett, Esq., of Langport. 



