Mr. A. H. Haliclay on new British Insects. 115 



Var. — Femoribus posticis et apice tibiarum fuscis. 

 England, F. Walker. 

 Cryptus arenarius, C. 508. 338 h . 



M. scutello convexo ; abdomine subpetiolato ; mesopleuris punc- 



tulatis ; tibiis testaceis, posticis apice fuscis, m.f. Long. 1| — 2 



lin. 

 On Salix argentea, Portmarnock, county Dublin, June. 



Subgenus Plectiscus, Gr< 

 There is so much dissimilarity among the species included 

 in this group that I would propose dividing it into two, and 

 adding a third for the reception of some small species, which 

 I formerly arranged with Xorides, but which agree with the 

 genuine Plectisci except in respect of the wings. 



Subgenus Helictes, C, 509 b . 



Abdomen petiolatum, segmento l mo attenuate, lateribus sinuato 

 tuberculis mediis. Terebra recondita aut subexerta. Thorax gib- 

 bulo-cylindricus. Antennae graciles involutse, radicula prominula, 

 scapo bulbiformi, oblique exciso. Areola nulla. Pedes graciles, pos- 

 tici subelongati. 



In this group I would place Cryptus impurator and erythro- 

 stoma, Gr. ; also the following : 

 Cryptus fulvicornis, C. 509 b . 347. 



H. abdominis medio pedibusque testaceis, coxis posticis basi fuscis, 

 antennis fusco-testaceis, /. Long. 2 lin. 



Var. — Segmentis intermediis fusco-cingulatis, etiam coxis posticis 

 totis fuscis. 



England, F. Walker. — Ireland. 



I think this is the female of P. erythrostoma. 

 Cryptus cruentatus, C. 509 b . 346. 



H. scutello pectore pedibusque rufis, posticorum tibiis apice tar- 

 sisque fuscis,/. Long. 3 — 3| lin. 



Var. — Segmentis intermediis margine castaneis. 



In shady places, Ireland. — England, F. Walker. 



Very active, and is continually rolling and unrolling the 

 spiral of its antennae. 

 Cryptus varius, C. 509 b . 348. 



H. abdominis cingulo pedibusque fulvis, coxis anterioribus, tro- 

 chanteribus facie, et linea hamata ante alas, albidis, m. Long. 

 %i lin. 



Portmarnock, June. 



12 



