GENERA AND SPECIES. 187 



the thorax, con vex, with a small fovea on each side at the base, 

 near the posterior angles : elytra vv^ith strong lines of punctures 

 very close together. (Length f of a line.) 

 My specimen was taken at Southgate, and presented to me 

 by Mr. F. Walker. 



Gen. 245." — Lissodema. Curt. 



Elliptical, convex : antennae inserted in cavities close to and before 

 the eyes as long as the thorax, clavate, pubescent, and 11-jointed, 

 the first 8 joints short, the 1st and 2d but slightly larger than 

 the 3d, the following gently increasing in stoutness, the 3 terminal 

 forming a long robust club, the 9th and 10th joints cup-shaped, 

 the 11th longer and ovate-conic: head trigonate, eyes lateral; 

 thorax orbicular, the sides dentated : scutellum triangular : elytra 

 very long and elliptic : legs short : thighs and tibiae simple : tarsi 

 5-jointed ; posterior pair 4-jointed ? the basal joint being as long 

 as the terminal one : claws slender. 



1. Heyana. Curt. 



Pitchy chesnut, shining, strongly and rather regularly punctured : tho- 

 rax with 4 or 5 denticulations on each side, and a fovea near each 

 posterior angle : elytra with numerous irregular lines of punctures : 

 mouth, antennas, and legs, pale castaneous. (Length 1^ line.) 

 Taken by the Rev. Samuel Hey, of Ockbrook, after whom 



I have the pleasure of naming this curious beetle ; it has the 



habit of a Rhyzophagus, but the antennae are different ; and, 



if I mistake not, the tarsi are heteromerous. 



Order. — Hymenoptera. 



Fam. — Ichneumonid^. 



Gen. 546. — Macrocentrus. Curt. 



Mandibles notched at the apex : maxillary palpi very slender, and 

 as long as the thorax, 5 ?-jointed, basal joint short, terminal ones 

 nearly of equal size and length : labial palpi tri ? -articulate, basal 

 joint the shortest, terminal one the longest : antennae longer than 

 the body, slender, filiform, basal joint robust and ovate : head 

 transverse : thorax elongate-ovate : abdomen, subsessile, fusiform, 

 or clavate : ovipositor as long as the antennae : superior wings, 

 with the marginal cell nearly reaching the apex, 3 sub-marginal 

 cells, the central one oblong ; 2 discordal cells, the superior one 

 large : inferior wings, with distinct nervures. 



