IIVMI XOPTERA. 



593 



Fijr. 119.- 



jtft JHW» 



Formica fusca and its jaws ; b, Polyerjfus rufcscem and 



?. Poh/ergiu, Latr., which is also destitute of a sting, but with the antenna; inserted near the mouth, ami the man- 

 dibles narrow, curved, or very much hooked. 1'. rufeecene, the Amazon Ant above described, Dot yet discovered in 



t li i > country, 



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

 a sting'. Peduncle of abdomen formed of ■ single knot ; 

 antenna? in these individuals thickened at the tip; mandi- 

 bles triangular ; head subtriangular. P. contracla, Latr., 

 a very small species, [first discovered in England by me]. 



Odontomackui, I.atr., has the peduncular node spined 

 above; the antenna; of the neuters filiform; the head 

 oblong, and deeply emarginate behind ; and the mandibles 

 long and narrow ; all the species are exotic. 



4. Mi/rmira, Latr., has also a stills', but the peduncle 

 of the abdomen is composed of two knots ; the antenna 

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



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



Eciton, Latr., differs from Hyrmica only in hai mi? linear mandibles. 



Attn, Fabr., differs from Myrmira only in having very short palpi; the head < 



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

 of the West Indies, above mentioned. 



Oryptocenu, Latr., fnrnished with a sting, with the peduncle of the abdomen 

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

 to receive the antenna;. South American insects, [monographed by Klug]. 

 [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 lleterogyna are solitary in their habits, each species being 

 only composed of winged males and apterous females, the latter always n * l20 -<"'■ «phiiot«. 



armed with a powerful sting ; the antennae are filiform or setaceous, vibratile, with the first and third 

 joints elongated ; the length of the first never equalling one third of these organs. They form the genus 



M DTILLA, Linn. 



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

 the abdomen long and nearly cylindric. Genera, Dorylue, fn>m Africa and India, and Labidus, from Smith 

 America, [to which must be added two others, described by Mr. Shnckard in his monograph on these genera, pub- 

 lished in the Annul; of Natural HUtory, Maj and June, 1840]. 



The others have the antenna inserted near the middle of the face ; the head is more robust than in the prece iin_r, 

 and the abdomen either conic or ovoid. These form the genus Mutilla proper, the spa ies of which are found in 

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

 but we are ignorant of their precise economy. 



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



Apterot/yiia, Latr., has the two basal if the abdomen in the form of knots j the male ant very 



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



Ptammotherma, Latr., has three cubital cells, with two recurrent nervures ; and the males have the antenna 

 pectinated. [Mutilla flabellata, Fabr., Cape of Good Hope.] 



Mali l,i proper, has also three cubital cells, with two recurrent Den BS, but the antenna are simple in both sexes, 

 and the second segmi ut of the abdomen does not form a knot. Type, Mutilla o mr o p t na, a rather common British 

 species]. 



Myrmota, Latr., differs from the preceding in bai tag the thorax in both lexea equal, but di\ ided into twodistinct 

 segments, with tin' abdomen conic in the females. 



Min iihi f, ,l,i, Latr., hU lie thorax Of the females a No equal above, but divided into tl Segments by suture 1 ;, 



and the maxillar) palpi verj short. [These insects are noti proved to be the females of thi p Tkynnue, placed 

 b\ Latreille in the family Scolietes.] 



Scleroderma, King, differs only in the maxillary palpi being; elongated, and the antenna has the see i join' 



not inclosed in tin- tip of tie- preceding, [Small continental species. See m\ monograph on tins genus, published 

 in the Transactioni of the Bntowul. 8oc. of London, vol. ii.] 



Methoca, Latr., has the thorax nodose, m. iekneumonidee, s rerj interesting insect, found but rare)] in this 

 country, resembling an Ant, and now proved to be the female of the genua Tengyra, placed by Latreille hi the 



next family.] 



THE SFXOM) FAMILY OF Till! \( I LEATBD HYMENOPTBRA*— 



'I'm F088OBM4— 

 Comprises those aculeate Ilvinenoptera which have all the individuals winged, and of two kinds nnlv 

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



Q Q 



