HYLURGUS. lOo 



Similar to H. pinipcrda but usually rather smaller ; 

 elytra with more delicate punctured striae, interstices more 

 closely punctured, row of tubercles on second one continued 

 to apex ; first tooth on outer-side of hinder tibiae placed in 

 middle, second far from apex. Rare ; Braemar. 



B. minor, Hart. 



Hylastes, 



A. Mesosternum not produced; third tarsal joint broad 

 heart-shaped. 



a. Central line of thorax either punctured or impunctate, 

 but not raised. 



I, Thorax with scarcely a trace of impunctate central 

 line, sides rounded. 



Black, antennae and legs red-brown. Very similar to 

 H. ater but more compressed ; rostrum with a deep impres- 

 sion on each side at apex ; thorax very closely punctured, 

 with scarcely a feeble trace of impunctate central line ; 

 elytra broader and more strongly punctured. L. 1| — If 1. 

 Not common. H. cunicularius, Ratz. 



JI, Thorax with a small, impunctate central line, 



sides straight. 



Black, antennae and legs red-brown. Rostrum impressed 

 at apex ; thorax longer than broad, closely punctured, with 

 impunctate central line on hinder half; elytra with punc- 

 tured striae, interstices granulate and wrinkled. L. If — 

 2 1. Common. H. ater, Payk. 



b. Thorax with a fine but distinct raised central line. 



jT. Rostrum without longitudinal furrow. 



Oblong. Blade, dull ; base of antennae and tarsi rust- 

 red. Thorax almost transverse, strongly punctured ; base 

 of elytra not raised. L. 1^1. Rather common. 



H. opacus, Er. 



II, Rostrum with a longitudinal furrow. 



Black, dull ; antennae and legs rust-red ; with fine gray 

 hairs, arranged in rows on elytra, rather more crowded at 

 apex. Forehead finely and very closely punctured ; rostrum 

 usually with a shallow excavated central line ; elytra with 

 punctured striae, granules on interstices irregular in front 

 and arranged in rows toward apex only. Narrower and 



