ENGIDvE. IPS. 



93 



Genus CLIII. — Ips, Herbst. 



Antenna; shorter than the thorax, the hasal joint longest, stout, subovate or 

 globose ; the second shorter than the third, which is slightly elongate ; the 

 five following short, more or less cup-shaped; the remainder forming an 

 ovate, compressed, coarctate, perfoliated club. Palpi filiform, subequal, 

 the terminal joint subovate, truncate: head large, exserted, broad posteriorly: 

 eyes small: thorax transverse, or subquadrate: elytra slightly truncate, 

 leaving the apex of the abdomen exposed : body oblong-ovate, convex: legs 

 short; femora stout; tibia; dilated and compressed at the apex; the inter- 

 mediate ones serrated exteriorly : tarsi five-jointed, the fourth joint minute. 



The typical species of Ips, by the width of the body, resemble 

 those of the genus Nitidula; but from that genus they differ in 

 several characters, as above indicated : all the species subsist upon 

 the sap of decaying trees, and are usually found beneath loose bark, 

 where there is an exudation of sap : they are mostly rare in this 

 country. Ips ferrugineus differs from the other species in form, 

 and seems admirably to connect the group of this family, to wliich 

 the present genus belongs, with Nemosoma and its cognate genera. 



A. Body somewhat depressed, rather broad. 



Sp. 1. quadriguttata. Subconvexa nigra, nitida, elytris maculis duabus Jlaves- 

 centibus, pedibus piceo-castaneis. (Long. corp. if — 2| lin.) 



Ips quadriguttata. Fabricius. — Steph. Catal. 90. A T o. 962. 



Black, shining ; head slightly punctate ; thorax quadrangular, with the lateral 

 and posterior edges margined: elytra ovate, convex, each with a trilobed 

 yellowish, or whitish, spot at the base, and another towards the apex, a little 

 behind the middle, transverse-ovate, nearly divided in the centre ; legs and 

 antennse pitchy-chestnut, with the club of the latter dusky : body beneath 

 black, or pitchy-red . 



This species differs from the two following by its usually smaller size, and by 

 the spots on the elytra being flavescent, ochraceous or whitish, and of dissi- 

 milar form, as above pointed out. 



Taken in abundance, beneath the loose bark of felled oaks in 

 the New Forest, by Mr. D. Bydder, in May : it has also been found 

 near Windsor. 



Sp. 2. quadripustulata. Linear i-elongata, subdepressa nigra, elytris maculis 



duabus rubris, anteriori sinuatd. (Long. corp. 2^ lin.) 

 Si. quadripustulata. Linne. — Ips quadripustulata. Steph. Catal. 90. No. 963. 



Linear-elongate, slightly depressed, black, finely punctured: thorax transverse- 

 quadrate, the disc rather flat, the lateral edges broadly, the posterior nar- 



