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Show INSECTA. 122 . di\fiduals men-of the 1n f · le sea1 e or knot.' antennre · ngu1 a r , and the head formed o a smg d tl e end. mandibles trta "ts posteriot• ex-tioned, thickest towar s l k· ~le emargination at 1 . h t any remar a nearly so, wlt ou 1 are nearly des- . The ma es trem1ty. L t Ibid., vii, 40. ·tr g numbers. They tit~e':;t:;:::• an~ ;:ve u~de~~::::syli;n~~:c~~; antennre and legs are very small, black, an a yellowish-bt•own. OooNTOMAOI ius ' Lat. . also f orme d of a single knot, d. 1 of the abdomen 1s . e The antennre of W h the pe 1c e f of a spm · . . erei nates supe riorly in the orm d of these same mdt· ·r • the hea . but term mall and filuorm, rginated poster10rly; h males are very s d is much ema tv ied uals forms a 1o n g square,r raonw parallel, an d terminated by three their mandibles are long, na ' teeth. . e foreign to Europe( 1 ). All the species ar MYRMIOA, Lat. . but where t h e p edicle of the abdo"1m1 en Also f urm· s hed with a -sunhg , tenore are eXIlosed; the max.1 ary • 1.' med of two knots. T e _an . . ts. the mandibles are tnangu· IS iOr ed of SIX JOlfl ' 1 • long and compos lpa pi Such is the The males are reddish and finely ar. lb"d x 62. · d F.. rouge ' Lat., 11 . , ' and smooth a bdomen'· a spme un er granulated, with a g os~!cle· the third ring somewhat brown. the first knot of the pe 1 ' It stings severe1 Y • In woods. EoxToN, Lat.(2) . entirely similar to the Myr· . sts of species l" This subgenus con~I . mandibles, which are mear. mi.c re, WI. th the exception of thetr ATTA, Fab.(3) 1 • those of the Only differing from Myrrnica in the very short pa pt; 1) Lat., Gener. Crust. et Insect., IV, 128. (( 2) Lat., Ib"d 1n0 .1 · • 1 ., " • . d'H' t Nat 2<1 eu1t10n. (3) CEcoDO:ME of t h e N ouv • Diet. IS • • ' HYMENOPTERA. 123 maxill~ consist at least of six joints. The head of the neuters is usually very Jarge. .!l.tta cephalotea, Fab.; Fourmi de viaite, Lat., Ibid., ix, 57. CRYJ'TOOERus, Lat. Always provided with a sting, and the abdominal pedicle formej of two knots; but the head, very large and flattened, has a groove on each side for the reception of a portion of the antennre. The species are peculiar to South America( I). The remaining Heterogyna are solitary Insects. Each specie~ is composed of but two kinds of individuals, winged males and apterous females; the latter are always a~med with a powerful sting. The antennre are filiform or setaceous, and vibratile; their first and third joints are elongated, and the length of the first is never equal to . the third of the total length of the whole organ. They form the genus MuTILLA, Lin.(2) In some species, of which the males only have been observed, the antennre are inserted near the mouth, the head is small, and the abdomen long and almost cylindrical, as in DoRvLus, Fab. Insects peculiar to Africa and India(3). LADIDUS, J u 1'. Hymenoptera of South Amet·ica, differing from the Doryli in their mandibles, which are shorter and narrower, and in their maxillary palpi, that are at least as Jong as those of the Jabium, and composed at ]east of four joints; in Dot·ylus, they are very small and at most biarticulated( 4). (1) See Lat., Hist. N:..t. des Fourmis; Gen. Crust. et Insect., IV, p. 124; Huber, Recherches sur les Fourmis Indigenes; Fabricius, &c. (2) Tribe of the MUTn.r.ABrJE, Lat., Fam. Nat. du Regne Animal 452 (3) See Fabricius; and Lat., Gen. Crust. et Insect., IV, p. 123. ' . (4) See Jurine and Lat., Ibid. |