1908.] 57 



Idiocbrus scuuua, Germ. 

 For a knowledge of the occurrence of tins fine insect in our 

 fauna we are indebted to Mr. E. A. Butler. It is readily distinguished 

 by the evident sculpture of the head and pronotum, and the rugose 

 surface of the elytra. 



AcOCEPHALUS JESTUAUINUS, 11. Sp. 

 3. Longer and narrower than the same sex of A. nervosus, from which it is 



further distinguished by the want of any white band on the pronotum or crown. 

 Upper-side sordid greyish-yellow, sometimes with a greenish tinge, very minutely 

 irrorated with fuscous. Crown a little shorter than the pronotum, about twice as 

 long in the middle as at the sides, its free edge feebly arcuate, in some examples 

 sublimate, with one very fine middle keel. Face pale, unmarked save for the dark 

 sutures and, occasionally, traces of pale curved lines on the frons ; the latter feebly 

 and narrowly excavated next its upper edge. Abdomen beneath black, the distal 

 edges of the last two segments broadly pale, genital plates entirely pale. Legs 

 greyish yellow- brown, claws blackish. Length 6 — 6^ mm. 



$ . Similar in colour to the male, biit the veins of the elytra are generally 

 irregularly spotted with black and the cells filled with a fuscous irro ration, so as to 

 leave a wide pale margin to the veins. Crown about one-half longer than the 

 pronotum, 2| to 3 times as long in the middle as at the sides. Abdomen entirely 

 pale or with dusky markings near the base of the segments on both upper- and 

 under-sides. Last ventral segment not differing appreciably in form from that of 

 nervosus. Length 7 — 7 2 mm. 



Not uncommon beneath low plants on muddy salt marshes at 

 Wells, Norfolk, where I beat specimens of both sexes, together with 

 empty nymph-skins, from Suceda frutieosa on August 28th, 1907. 

 I first found it there in August, 1883, when I regarded it as the same 

 as A. nervosus, and so recorded it. The female is distinctly narrower 

 and more parallel-sided than the same sex of nervosus, and does not 

 develop the different colour-forms which are so commonly met with 

 in a series of the latter. 



ACOCEPHALUS LIMICOLA, 11. Sp. 



$ . Upper-side greyish yellow-brown or dark brown, elytra with a black or 

 blackish anteapical curved band somewhat similar to that found in A. histrionicus, 

 their extreme apex often narrowly white. Crown very feebly excavate, subequal in 

 length to, or in some cases a little shorter than, the pronotum, with three keels, the 

 middle one very fine, the two lateral blunt, diverging, and not reaching the front 

 edge. Face yellow-brown, sometimes with pale curved lines on the frons. Outline 

 of the pronotum and basal two-thirds of the crown, in the lateral aspect, flat. 

 Abdomen beneath black, distal edge of the last one or two segments more or less 

 broadly pale. Genital plates pitch-brown, their inner edges narrowly reddish. 

 Legs yellow-blown, front pairs of tibia? black at the apex, hind tibire and tarsi 

 blackish, the latter pale at the base. Length 4 mm. 



