Hister.'] CLAVICORNIA. 199 



The larva of If. unicotor is described and figured by Schibdte, De Metainorphosi 

 Eleutheratorum, Part ii. p. 62, Plate i. fig. 1 ; it is of a dirty-white colour with 

 the corneous parts fuscous and the coriaceous parts yellowish ; it is rather broad and 

 almost parallel-sided until the ninth segment of abdomen, which is broad ami bears 

 two short cerci composed of two joints ; the head is narrower than prothorax, with 

 very powerful mandibles ; ocelli wanting ; antennae short ; prothorax large, longer 

 than meso- and metathorax together, these two latter being very short; the pro - 

 thorax is deeply channelled in the centre and at sides ; the abdominal segments are 

 contracted at apex and base, and each is furnished with a row of minute scuta in front 

 and behind ; legs very short, not or scarcely visible from above. 



I. Thorax coarsely punctured on the under surface 

 of margins ; antennal cavities not distinct ; size 

 larger ; elytra with four more or less distinct red 



markings often confluent H. QUADRIMACULATUS, L. 



II. Thorax with under surface of margins almost 



impunctate ; antennal cavities always well 

 marked ; size smaller. 



i. Mesosteruum emarginate in front, prosternuni 

 rounded at base. 



1. Elytra with an outer lateral stria abbre- 

 viated behind, and an inner lateral stria 

 abbreviated in front, not meeting ; three 



dorsal stria?, as a rule, entire H. UNICOLOR, L. 



2, Elytra with a continuous outer marginal stria 



only ; four dorsal stria?, as a rule, entire. 



A. Thorax with two stria? near margins. 



a. Form long oval, subparallel ; club of 

 antenna? red ; anterior tibia? with four 



teeth H. MEBDAEIUS, Hoff. 



b. Form short oval ; club of antenna? 



black -brown ; anterior tibiae with 



5-6 teeth, 

 a*. Frontal stria in the form of a 



semicircle, often obsolete in middle ; 



average size larger ; epipleurse not 



rugosely punctured H. CADAVEBINUS, Hojf. 



b*. Frontal stria always entire, in the 



form of a semicircle depressed at 



vertex into an angle pointing back- 

 wards ; average size smaller ; epi- 



pleura? rugosely punctured . . . . H. SUCCICOLA, Thorns. 



B. Thorax with one stria only near margins. 



a. Lateral stria on elytra abbreviated 



behind and usually also in front . . . H. STEBCOEARIUS, Ilnff. 



b. Lateral stria on elytra entire. 



a*. Epipleura? smooth ; elytra with a 

 large ill -defined reddish spot on each 

 (rarely absent and sometimes suffused 



over the whole elytra) H. PUEPUEASCENS, Hcrbst. 



b*. Epipleurae punctured; elytra 



always unicolorous black, 

 af. Sutural stria of elytra almost 



entire ; elytra with a trace of a 



fifth dorsal stria at base ;* teeth'of 



front tibiae very fine H. MABGINATTJS, Er. 



* In this work the first dorsal stria of elytra "is regarded as next the margicp.1 



