and Asiatic Species of Laius. 323 
at Oxford, and in the collection of Mr. H. E. Andrewes. 
Certain African forms referred to the last-named genus by 
various authors were noticed in my previous communication, 
and placed under a new generie name, Heterolaius, op. cit., 
p.- 179. Of the 80 species here enumerated, three only are 
African, the others Asiatic. No Laius, as restricted by me, 
has been seen from Central, West, or 8. Africa, the recorded 
forms from the Congo and other tropical regions probably 
all belonging to Heterolaius. These insects have the anterior 
tarsi 5-joited and simple in the two sexes. The antenne 
(which are treated as 10-jointed) of the males are formed very 
much as in the American genus Collops*, the second joint 
being usually enormously dilated, often concave and ear-like, 
and in some species bearing a long slender appendage. A 
large number of Australian Laius have been described by Lea 
aid other writers, but very few of them seem to be repre- 
sented in the British Museum. The type (2? ), L. cyaneus, 
Guér. (Aeterocerus, Boisd.), is unknown to me. A drawing 
of a portion of the ¢ antenna of all the species represented 
by that sex in the material before me is appended: four 
of these antennze have been figured by various writers, but 
they are included here for comparison. 
LAIvs. 
Laius, Guérin, Voyage ‘ Coquille,’ Zool. ii. p. 78 (1830) (2); Erichson, 
Entomographien, p. 62 (1840) (¢ 9); Abeille de Perrin, Ann. Soc. 
Ent. Fr. 1891, p. 208 (¢ 2) [type L. cyaneus, Guér., New Guinea] ; 
nec Motsch., 1859. 
Megadeuterus, Westwood, Trans. Linn. Soc. London, xvi. p. 678 
(1838) (9) [type Paussus flavicornis, F., Java. 
Intybia, Pascoe, Journ. Ent. ii. p. 448 (1866) (Q) [type J. guttata, 
Pasc., Batchian]. 
Amanicollops, Pic, L’Echange, xxiv. p. 25 (1908) (3) [type A. obseurus, 
Pic, Amani, E, Africa]. 
Key to the Species of Laius. 
A. Anterior tibie of ¢ thickened basally ; upper surface 
metallic; body and legs black. [Latus, Guér.].. Species 1-3. 
B. Anterior tibiz of ¢ simple. 
a. Head of ¢ not dentate. 
a, Elytra metallic; upper surface shining. 
a’, Head and legs black, prothorax testaceous.. Species 4. 
6°. Head and prothorax (except on disc) testa- 
Pacem nies DIREIG) ool) g's W siele . qWildeadels cs Species 5. 
ce’, Head, prothorax, and legs (in part or wholly) 
testaceous ...... ami Saas oP) alg sercave Nai axe Species 6. 
* Cf. Champion, Trans. Ent. Soc. Lond, 1914, pl. ii. 
22* 
