PACHYMERUS Grav. 



Antenna inserted in front of the face, not so long as the body, 

 slender at the base, slightly thickened to the apex, composed 

 of at least 22 joints, the basal ones forming an ovate mass, 3rd 

 elongated, the following decreasing in length, being oblong be- 

 yond the middle ; pubescent in the male, and each joint pro- 

 ducing a bristle on the inside. 



Labrum trigonate, anterior margin rounded and ciliated with 

 long hairs, with a membranous strap-shaped lobe in the 

 centre (2). 



Mandibles elongate-trigonate, broad and bifid at the apex (3). 

 Maxillce terminated by 2 large rounded lobes, the outer one ci- 

 liated. Palpi long, pilose and 5-jointed, basal joint clavate, 

 2nd longer and stout, the remainder decreasing in bulk, the 4th 

 not longer than the 1st, the terminal one linear (4). 

 Mentum obconical. Lip large and slightly cordate. Palpi ra- 

 ther longer than the lip, pilose and 4-jointed, basal joint cla- 

 vate-truncate, 2nd stout subglobose, the following elongate- 

 ovate (5). 

 Head short and narrow, base concave ; face convex : eyes remote, 

 small and ovate : ocelli 3 in triangle on the crown. Thorax narrow 

 and elongated : scutel semiovate, convex : postscutel long and nar- 

 roiv, with 4 elevated lines. Abdomen suhfusiform, gradually nar- 

 rowed to the base, the apex compressed and clavate ; broader and 

 deeper in the female (6) ,• truncated obliquely with a long groove to 

 receive the short and stout ovipositor which extends about \th be- 

 yond the apex. Wings ample, superior icithout an areolet, stigma 

 and marginal cell elongated, the upper discoidal one with a short 

 internal branch (9). Legst;ery slender, excepting the hinder, which 

 are long and stout : coxae, jjosterior long, their thighs thick in both 

 sexes : tibiae spurred, hinder long and clavate : tarsi long, simple, 

 and 5-jointed, basal joint long, 41 h the smallest : claws a7id pulvilli 

 minute. 



Calcitrator Grav. — Curt. Guide, Gen. 535. No. 150. 



Black, shining ; antennae brown, yellow beneath ; apex of the 

 petiole, 2nd, 3rd, and 4th segments rufous, the 2nd generally 

 with a brown patch on the back, the remaining segments edged 

 with white : nervures and stigma brown : legs brown, 4 ante- 

 rior ochreous, except on the outside ; hinder tibiae sometimes 

 inclining to reddish-brown, especially at the base : expanse 

 6-^ lines. 

 Not an uncommon insect. I have taken the female at Coomb 

 Wood and in the Isle of Wight the middle of June, and males 

 at Darent and Dover the end of July. Mr. Shuckard finds 

 both sexes on umbellate flowers in Battersea Fields. 



The Plant is Scandix {Myrrhis Scop.) odorata, Sweet Cicely 

 found at Knaresborough by J. Walton, Esq. 



