40 Prof. J. C. Schiédte on the Tunnelling Coleopterous 
(amongst the Danish in H. sericans, intermedius, Physites aureolus 
and Augyles hispidus) the arch is continued as an excessively 
thin and sharp recurring ridge, as far as the apex of the poste- 
rior coxe, thus completing a larger section of the eircle. Inter-. 
mediate forms between this and the common structure do not 
seem to occur. 
DANISH SPHCIES. 
HETEROCERUS, F. 
Antenne 11-jointed, the club abruptly separate; third and fourth joints 
very small. 
Maxillary lobes spinulous. 
Inner lobe of mandibles membranaceous, with membranaceous comb. 
A. Lateral angles of pronotum rounded, without marginal groove. 
Inner lobe of mandibles slightly emarginate in the middle. 
Body oblong, with parallel sides, flatly vaulted. : 
Pronotum in the male broader than the elytra, in the female of the 
same breadth as these. 
a. Arches of creaking-apparatus ending in the posterior margin of the’ 
first ventral segment. 
1. H. femoralis (Kiesenw.), fr. 
5. Arches of creaking-apparatus recurring from the posterior margin 
of the first ventral segment towards the apex of the third pair of 
coxee. ; : 
2. H. sericans (Kiesenw.), m. fr. 
B. Lateral angles of pronotum with deep marginal groove. 
a. Lateral angles of pronotum rounded. 
Inner lobe of mandibles with a sharp indentation in the middle. 
Body oblong, with parallel sides, flatly vaulted. 
Pronotum in the male as broad as elytra, in the female narrower. 
Arches of creaking-apparatus ending in the posterior margin of the 
first ventral segment. 
3. H. obsoletus (Curt.), fr. 4. H. levigatus (Panz.), m. fr. 
5. H. fusculus (Ksw.), fr. 
b. Lateral angles of pronotum pointed. 
Body oblong, rounded, rather high vaulted, almost the same in both 
sexes. 
* Arches of creaking-apparatus ending in the posterior margin of 
first ventral segment. 
6. H. marginatus, Ksw. 
* Arches of creaking-apparatus recurring towards the posterior coxee. 
7. H. intermedius, Ksw., r. 
va 
PHYRITES, nov. gen. 
Antenne 11-jointed; the club increasing gradually from the third joint. 
Mazillary lobes spinulous. 
Inner lobe of mandibles bifid, the lower division membranaceous, with 
membranaceous comb, the outer division horny, with fringed margin, 
and carrying five or six very thick horny spines. 
1. P, aureolus, v, sp. (Oblong, rounded sides, highly vaulted ; hairy 
