IIYMENOPTERA. 



593 



?. /'o^/cr^y^jLatr., which is also destitutoof astin^, but with the antcnmx inserted near themouth, and the man- 

 dibles narrow, curved, or very much hooked. P. rufesccm, the Amazon Ant above described, not yet discovered in 



this country. 



3. Ponera, Latr., the neuters and females armed with 

 a stiri^'-. Peduncle of abdomen formed of a sin;jle knot ; 



——_..:— ft £^ Vi!4S-'4i#'^'= X antenniE in these individuals thickened at the tip ; mandi- 



^„--^ r^-T-\ ^.''^^t^ ^ \^3^^: ^^*^^ triangular ; head subtrian^ular, P. contractu, Latr., 



a very small species, [first discovered in Enj2;land by me]. 

 Odontomachus, Latr., has the peduncular node spined 

 above; tbe antcnnie of the neuters fitiforni ; the head 

 oblong, and deeply emarginate behind ; and the mandibles 

 long and narrow ; all the species are exotic, 



4. Mi/rmka, Latr., has also a sting, but the peduncle 

 of tbe abdomen is composed of two knots ; the antenna; 

 exposed; the maxillary palpi long and 6-jointed; and 



the mandibles triangular. F. rubra [misprinted nt/a by Latreille], Linn., a very common British species. 



Edfon, Latr., difiers from Myrmica only in having linear mandibles. 



/^f^^a, Fabr., differs from Myrmica only in having very short palpi; the head 

 of the workers is generally very thick. A. ccphaloles, Fab., the Visiting Ant 

 of the AVest Indies, above mentioned. 



Cn/ptoceru-s, Latr., furnished with a sting, with the peduncle of the abdomen 

 forn)ed of two knots ; the head very large and flat, with a groove on each side 

 to receive the antennte. South American insects, [monographed by King], 

 [The excellent monograph of the ants by Latreille, and, as relates to their 

 habits, the memoirs of Huber, ought to be consulted in this family.] 



The other Heterogyna are solitary in their habits, each species being 

 only composed of winged males and apterous females, the latter always ^'° '-o— ^na ctphriiu:u-,, 



armed -wit!] a powerful sting ; the antennas are filiform or setaceous, vibratile, with the first and third 

 joints elongated ; the length of the first never ec|ualling one tliird of these organs. They form the genus 



WuTiLLA, Linn. 



Some, of which males have only been observed, have tbe antenns inserted near the mouth ; the head small, and 

 the abdomen long and nearly cylindric. Genera, Donjhi.s, from Africa and India, and La/>idu.v, from South 

 America, [to which must be added two others, descriljed by Mr. Shuckard in his monograph on tliese genera, pub- 

 lished in the Annols of Natural His/ori/, May and June, 1840]. 



The others have the antennje inserted near the middle of the face ; the head is more robust than in the preceding, 

 and the abdomen either conic or'ovoid. These form the geims Mutilla proper, tbe species of which are found in 

 hot sandy districts. The females run quickly, and always on the ground. The males often alight upon flowers, 

 but we are ignoi'ant of their precise economy. 



Some have the thorax nearly cubical, and not nodose in the females. 



Apterogiiiia, Latr., has the two basal segments of the abdomen in the form of knots ; the male antennas are very 

 long ; the fore-wings have only basal cells, and a single cubital small and rhomboidal cell. [Exotic insects.] 



Psarnviotherma, Latr., has three cubital cells, with two recurrent uervures ; and the males have the auteunro 

 pectinated. {Mulilla ffabellaiai Fabr., Cape of Good Hope.] 



Mutilla proper, has also three cubital cells, with two recurrent nerves, but the antenna; are simple iu both sexes, 

 and the second segment of the abdomen does not form a knot. Type, Mutilla europ>.ea, [a rather common British 

 species]. 



Mijrmo.^n, Latr.,ditrers from the preceding in having the thorax in both sexes equal, but divided into two distinct 

 segments, with the abdomen conic in tbe females. 



Mjirmccoda, Latr., has the thorax of the females also equal above, but divided into three segments by sutures, 

 and the maxillary palpi very short. [Tliese iusects are now proved to be the females of the genus TIninnus, placed 

 by Latreille in the family Scolietes.] 



•Sclerodenna, King, differs only in tbe maxillary palpi being elongatcil, and the antenna' has the second join' 

 not inclosed in the tip of the preceding. [Small continental species. See my monograph on this genus, i)ublished 

 in the Transactions of the Entomol. •Soc. of London, vol. ii.] 



Mcthoca, Latr., has tbe thorax nodose. {M. ichncinnoyudcs, a very interesting insect, found but rarely in this 

 country, resembbng an Ant, and now proved to be the female of the genus Tengyra, placed by Latreille in the 

 next family.] 



THE SECOND FAMILY OF THE ACULEATED HYMENOPTERA,— 

 The Fossores, — 



Comprises those aculeate Ilyraenoptera which have all the individuals winged, and of two kinds only 

 [males and females], and which live solitarily, their legs being fitted only for walking, and in many for 



Q Q 



