HYMENOPTERA, 
317 
tonnfo thickened towards the apex. Anterior and intermodiato tibino with a 
single apical spine. One elongate marginal coll, and two submarginal cells, the 
first twice the length of the second ; the first recurrent nervuro uniting with 
the first transverso-medial ; the second received a little within the second 
submarginal cell. Abdomen cordiform, petiolated, the elongate petiole cla- 
vate at its apex. Habit of Polyhia among the Vespidcs, Sp. A. vespoides, 
sp. n., pi. 6. fig. 4, Brazil. 
Mkcothyris, g. n., Smith, 1. c. p. 807, pi. 6. Eyes very large ; ocelli placed 
in a triangle. Antoimm subclavate. Mandibles bidentate; clypeus tri- 
angular; labrum concealed. Metathorax short, truncate. One elongate 
marginal cell tapering to a point, and three submarginal cells, the first being 
three-foui’ths of the length of the second and third, the second oblong-quad- 
rate, the third oblique, and widest at its extremity. Hinder tibia3 incrassate, 
slightly curved, and denticulate. Abdomen subtruncate at the base, in- 
curved and tapering to the apex ; second segment produced into a compressed 
tubercle beneath. Genus founded on the characters of the S only. Sp. M. 
tliorncicus, sp. n., p. 308, pi. G. fig. 5, Australia. 
Parapison, g. n.. Smith, 1. c% p. 298. Separated from Pison and Pisonitus 
on account of the obliteration of the second submarginal cell of the foro 
wings, which in those genera is always present and petiolated, although in 
some species minute. Spp. : P. ohliteratus, Smith; P. mjlpes, sp. n., p. 208 
and pi. G. fig. G (wing), India; P, rujicornis, sp. n., 1. c. p. 300, Australia; P, 
agilis, sp. n., ibid., Ceylon. 
Silaon [sic], g. n., Piccioli, Bullet, d. Soc. Ent. Ital. i. p. 282. The cha- 
racters are those of Pisonitus (Shuck.), with the following exceptions: — 
Eyes entire, more widely separated, leaving ampler space for the frons and 
vortex and for the ocelli, which form a right-angled triangle; antenneo 
shorter, originating lower down, and having the third joint not longer than 
the first. The orthography should bo Sylaon, according to the Greek deri- 
vation given by the author in a note (p. 283). This genus is established on 
the $ only. Sp. S. compeditusy sp. n., p. 283, pi. 1. fig. 2, Fiesole, 
New Bpecies : — 
Pison, Smith {1. c.) describes the following new species :—P. tibialis, 
hasalis, and simillimus, p. 292, P. aurifex, p. 293, P. sqmratus and fuscipennis, 
p. 294, P. decipiens and dimidiatus, p. 295, P. festivus, p. 296, all from Aus- 
tralia ; P. tuhercidatus, ibid., New Zealand ; P. insularis, p. 297, New Hebrides ; 
P. fabricator, ibid., Hong Kong; P. coriformis, ibid., Mexico. 
Astata costae, Piccioli, 1. c. pp. 38-40, pi. 1. fig. 1, 5 — ocxdata, Jur. cf 
Monte Ceceri, near Florence. 
Larrada chrysonota, Smith, 1. c. p. 304, Australia ; L, luteipennis, Cresson, 
Trans. Amer. Ent. Soc. ii. p. 293, Cuba. 
Priononyx hifoveolata, Taschenborg, 1. c. p. 408, New Friburg. 
Enodia nigropcctinata, Tasch. I, c. p. 409, and albopictinata (sic), Tasch. 
1. c. p. 410, Chartum. 
Chlorion bicohr, l)o Saussure, Stettiner entoni. Zeitung, 1809, p. 5G, 
Monte Video ; C. metallicum and pretiosmn, Tasch. 1. c. p. 421, La Plata ; C. 
paUidipenne and nobilitatum, Tasch. 1. c. p. 422, Parana. 
Sphex. Taschenberg, 1. c., describes the following species : — <S. siamcnsis, 
1869. [voL. VI.] z 
