CARABID.qi:. IIELOBIA. 61 



fourth nearly as long as the second, clavate-truncate : lahrum transverse : 

 mandibles small, denticulated at the base : labium quadrate, with a spine in 

 the centre. Antennce linear: body depressed: thorax transverse, cordate- 

 truncate, the margin rugose, the basal angle straight : tuings two : legs rather 

 elongate : ante7-ior tlbiw with an obsolete notch : anterior tarsi of males 

 slightly dilated. 



Helobia differs from Alpseus in possessing wings, and from Ne- 

 bria by the joints of the internal maxillary palpi being nearly equal 

 in length, by the quadrate labium, and in other less important cha- 

 racters : the species chiefly abound in inland and alpine districts, 

 under stones, at the roots of trees, and in loose gravelly or clayey 

 banks. There are many species allied to H. Gyllenhalii found on 

 the continent ; and were persons residing in the mountainous dis- 

 tricts of Britain to search diligently, they would no doubt be re- 

 warded by the discovery of some of them. 



Sp. 1. brevicollis. ISifjer, palpis, antennis, tihiis tarsisque rufo-piceis, elytris 



punctato-striatis. (Long. corp. 4^ — 6 lin.) 

 Ca. brevicollis. Fabricius. — He. brevicoUis. Staph. Catal. No. 85. 

 Glossy black : antennae, palpi, tibiae, and tarsi pitchy-red : elytra deeply striated, 



the striae strongly punctate, with three or four larger impressed dots on the 



third stria from the suture, and a few slight impressions on the margin : 



sides of the thorax very rugose. 

 Var. ^. Rusty-black, with the legs entirely rufous. 



One of the most abundant carabideous insects throughout Great 

 Britain, and, I believe, equally common in Ireland ; being found, 

 especially in the spring, in dry gravelly banks, and beneath stones, 

 at the roots of trees, &c., on the loftiest mountains of this country, 

 as well as in the lowlands. 



Sp. 2. Marshallana. Plate IV. f. 4. — Nigro-piceus, depressus, antennarum 

 apice tarsisque rufo-piceis, elytris striatis,striis obsoletissime punctatis. (Long. 

 Corp. 4| lin.) 



He. Marshallana. Steph. Catal. No. 86. 



Shining pitchy-black : the tip of the antennae and the tarsi pitchy-red : elytra 

 striated, the striae with very obsolete impressed puncta ; three or four larger 

 impressed dots on the third stria from the suture ; and a few impressions on 

 the external stria : legs pitchy-black, with the tarsi rufous. 



Var. /5. Above piceous, with the legs deeper, the tibiae and tarsi rufous. 



This and the following are very closely allied to Ca. nivalis of 

 Paykul, but they nevertheless appear to be distinct, as that insect 

 is said by him to want the impressions on the marginal strise of 

 the elytra. This species differs from the next by being consider- 



Mandibulata, Vol. I. 1st November, 1827. i 



