HYMENOPTBRA. 239 



M. europcea, L. ; M. tricolore Coqueb., Illust. Icon. Insect., 



dec. II, xvi, 8. The female is black, with a red thorax and three 



white bands on the abdomen ; the two last approximated. She 



is provided with a powerful sting. The male is bluish black 



with a red thorax and the abdomen as in the female *. 



Those species which, in both sexes, have the thorax equal above 



but divided into two distinct segments, with the abdomen conical in 



the females and elliptical and depressed in the males, compose the 



genus 



Myrmosa, Lat. Jiir.\ 

 Those, in which the thorax of the females is still oval above, but 

 divided into three segments by sutures, where the maxillary palpi are 

 very short, and the second joint of the antennae is set in the first, form 

 the genus 



Myrmecoda, Lat, \ 



Scleroderma, Kliig., 

 Only differs from Myrmecoda in the elongation of the maxillary palpi 

 and antennae, of which the second joint is exposed §. In 



Methoca, Lat., 

 The top of the thorax is as if knotted or articulated ||. 



FAMILY II. 



FOSSORES^. 



The second family of this section comprises those Hymenoptera 

 armed with a sting, in which all the individuals of both sexes are fur- 

 nished with wings, and live solitarily ; in which the legs are exclu- 

 sively adapted for walking, and in several for digging. The ligula is 

 always more or less widened at its extremity, and never filiform or 

 setaceous. The wings are always extended. 



They compose the genus 



Sphex, Lin. 



Most females of this genus place beside their eggs, in the nests they 

 have constructed, most commonly in the earth or in Avood, various 



* Mv.tiUa flaheUata, Fab.; 01iv,,Encyc. Method., sxticle. Mutille ; and Kliig, En- 

 tom., Brazil. Specim. 



t Lat., Gen. Crust, et Insect., IV., p. 119, and Jurine on the Hymenoptera: 



J Lat., Ihid., p. 118. 



§ Lat., Ibid. 



II Lat., Ibid. 



^ M. Van der Linden, already quoted, has lately acquired a new title to our esteem, 

 by the publication of the first part of a Monograph of the European Insects of this 

 family. See Observ. sur less Hymen. d'Eur., de la Fam. des Fouisseurs. 



N.B. The divisions of the family of the Fossores form so many principal genera or 

 subgenera. ScoLiA, Sapyga, Sphex, Bembex, Larra, Nysson, Crabro, and 

 Philanthus. 



