Atlantic Coleoptera. 229 
Arthrolips piceus. 
Clypeaster obscwrus, Dej., Cat. 129 (1821). Clypeaster 
piceus, (Kunze), Comolli, De Nov. Col. 50 (1837). Gry- 
phinus piceus, Redt., Fna. Austr. 574 (1849). Arthrolips 
piceum, Woll., Ins. Mad. 476 (1854); Id., Cat. Mad. Col. 
142 (1857). Arthrolips obscurus, Duval, Gen. des Col. 
d’Hur. ii. 232 (1859); Woll., Col. Atl. 91 (1865). 
Hab.—Maderenses (Mad., Des.) , et Canarienses (T'en.) ; 
in inferioribus intermediisque, hinc inde vulgaris. 
Fam. PTILIADA. 
p. 96 (genus AcROTRICHIS). 
After species 274 insert :— 
Acrotrichis brevicornis. 
Acrotrichis brevicornis, Mots., Bull. de Mosc. 174 (1868). 
Hab.—Maderenses (Mad.) ; sub quisquiliis in inter- 
mediis degens. 
Mixed-up with my examples of the A. atomaria, from 
the intermediate districts of Madeira, are a certain number 
which are said to differ slightly from the rest (but the 
“ differences” in which are to my eye totally inappreci- 
able), and which constitute the form for which Motschoul- 
sky has recently proposed the name of brevicornis. During 
our late visit to the island we met with it both in the 
region of “the Mount” and in that of 8. Antonio da 
Serra; but until the Monograph of Mr. Matthews makes 
its appearance I will not attempt to give a regular diag- 
nosis of the “ species,” or to do more than just allude to the 
fact of its acknowledgment both by him and by Mots- 
choulsky. All indeed that the latter (who cites ‘ Dal- 
matia” for its habitat, as well as Madeira) says concern- 
ing it is as follows :—“ Forme enti¢rment de l atomaria, 
mais moitié plus petite, luisante 4 ponctuation trés fine, 
pubescence sur les élytres assez forte, pattes testacées, 
antennes noiratres, ne dépassant pas en longueur les 
angles post. du corselet.” 
TRANS. ENT. soc. 1871,—PaART II, (MAY.) R 
