INSECTA HYMENOPTERA. 237 
of hair ; L. villosus, L. distinctus, and L. (?) collaris, new New Holland 
species. 
The reporter (Arch. 1842, i. p. 262) has described several new species 
from Van Diemen’s Land; Thynnus Olivieri, of which Myzine aptera, 
01., is the female; Th. senilis njidi fervidus, the former belonging to the 
first, the latter to the third of King’s sub-divisions, and Th. humilis, a 
female ; lastly, a new genus, Ariphron, has been characterized (tab. 5, 
f. 8) from an individual female, which varies from that of Thynnus by 
having simple claws, and the abdomen not being swollen, &c. The 
species is called A. hicolor. 
Mutillari^. — The reporter (1. c. p. 261, 262) has described two new 
species from Van Diemen’s Land, Mutilla soluta and hlanda. 
DoryliDuE. — Westwood has given an excellent view of this group 
(Arcana Ent. i. p. 73, pi. 20), for which the labours of Shuckard have 
laid the foundation. Lalhdus is enriched with several new species, viz., 
the division with a triangular pedicel to the abdomen, with L. Burchelli 
from Brazil, which, however, may be identical with L. Fargeavii, 
Shuck. [Latreillei, LepelL), supposing that an error has occurred in the 
account of the size (14'"). Our specimens of this insect have a dilata- 
tion on the mandibles internally below the point, which the author’s figure 
does not show. Also with L. Servillei from Para. The division, with 
a transverse quadrangular pedicel, has been increased with one small 
sub-division, viz., — such as have moderately long legs ; in this are two 
Brazilian species, L. Hartigii and Esenbechii, both distinguished by 
long tufts of hair on the sides of the abdomen ; the other species of this 
division have remarkably short legs. To those described by Shuckard, 
are added L. Fonscolomhii, Gravenhorstii, Spinolce, Walkerii, Frich- 
sonii, all from Brazil. The genus ^Fnictus has been enriched with a 
second species, jE. certus, whose native country is unknown ; Dorylus 
and Rhogmus contain only the species described by Shuckard. On the 
plates, several of the new species, and the parts of the mouth of Labidus, 
are figured. Westwood thinks, that the Dorylidce approach the ants by 
the separated first ring of the abdomen, and he considers them as 
belonging to the same group ; at all events, they stand nearer these than 
any other family. 
Formicari^. — Robert has laid some observations on the habits of the 
ants before the Parisian Academy (Ann. d. Sc. Nat. xviii. p. 151, and 
Froriep, N. Notiz. xxiv. p. 113), One of them concerns the roads which 
F. rufa makes outside the nest. When the swarm is old and strong, 
ten roads run pretty regularly from the nest in the form of rays, as 
far as the surrounding country permits, at regular distances, and only 
in very extreme cases deviating from the straight direction. The author 
could follow these roads for 47 metres; nay once, where, from the 
nature of the ground, only five were formed, for 77 metres. He explains 
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