168 Mr. G. R. Waterhouse's Notes on 



enlarged in such a mimner that the pale colour prevails. Its 

 locality is given as " the banks of the Thames, beyond Graves- 

 end." Dr. Power has a fine scries of specimens from the same 

 place, including varieties resembling Mr. Stephens' specimen. 



Hcterocertis rectus, Waterh. 



. fossor, Kiesenwetter, Germ. Zeitschr. iv. 204, 2, 



pi. 3, f. 3 ? 



H. oblongus, parallelus, niger, pube pallida cinerea vestitus ; 

 thoracis angulis posterioribus immarginatis ; elytris angustis ; 

 fasciis maculis, basique rufo-testaceis ; pedibus piceis. 



Long. 2;^ lin. 



This species agi'ees with H.Jlexuosus in not having the thorax 

 margined at the posterior angles; the markings on the elytra, 

 moreover, are essentially the same, excepting that the first discoi- 

 dal spot is rather more remote from the post-median band ; and 

 the bulk of the insect is about the same, but the form is difterent, 

 being narrower, and more parallel ; both thorax and elytra are 

 relatively longer ; the head is narrower ; the spines of the ante- 

 rior tibiae are rather stouter and shorter, and the pubescence is 

 shorter. The thorax is rather broader than the elytra, has the 

 sides gently rounded, and is somewhat contracted in front ; the 

 hinder part is obliquely truncated on either side, and the poste- 

 rior angles are obtuse. (In H. Jiexiiosus the sides of the thorax 

 are more strongly rounded, and the upper surface is more convex.) 

 Sometimes there is an indistinct rufescent spot at the anterior 

 angle, but usually the thorax is uniformly black. The elytra are 

 elongate, and with the sides parallel : the markings consist of a 

 transverse mark at the base, which is somewhat dilated at the 

 part nearest to the scutellum ; three discoidal spots, and two 

 bands; the humeral band is recurved in some specimens so as 

 almost entirely to enclose a small oblong dark area at the shoul- 

 der ; in others, the inner branch of this band is wanting ; the 

 post-medial band often runs inwards and forwards to join the 

 second discoidal spot, but sometimes the spot is free, and the 

 band is almost obliterated. The third discoidal spot often joins 

 the pale edging of the apex of the elytra, the whole outer margin 

 of which is pale. The legs are either pitchy or fuscous ; the 

 tarsi testaceous. The anterior tibias are rather less broad than 

 in H.Jlexuosus. 



Ten specimens of this insect examined by me present no sexual 

 distinctions, still I am strongly inclined to believe that the male 



