4- 



V 



Vr"' 



J'' 



\ 



50 HTMENOPTEEA. 



but deep, furrow runs from the ocellus to the base of the antennae. The centre of the 

 head is broadly hollowed ; and there is a curved and moderately wide furrow on the 

 inner side of the lateral protuberance. Clypeus broadly rounded, almost transverse in 

 the centre, shining; the apex flat, not projecting, and almost impunctate. Labrum 

 broadly projecting and truncated in the middle. Mandibles red, black at the base ; the 

 upper side margined and furrowed close to the lower edge ; on the lower side is a wider 

 furrow, and placed at a greater distance from the edge than the upper one ; closely 

 punctured at the base, and with only a few scattered hairs. Thorax covered with a 

 short, thick, dark pile, closely and rather strongly punctured ; the metathorax rugosely 

 punctured, the apex with a sharp oblique slope, and irregularly transversely striolated, 

 and rather thickly covered with moderately long, dark fulvous pubescence. Abdomen 

 narrow, acute at the apex, longer than the thorax, shining ; fulvous, except for a few 

 rather long hairs on the ventral surface at the apex ; the pygidial area furrowed along 

 the sides, the .furrow not extending to the base, the apical ventral segment also furrowed 

 laterally and punctured. Legs densely pruinose; the coxse punctured and densely 

 covered with white hair. 



^ 2. Larra rufitarsis. (Tab. IV. fig. 11, <y .) 



.<S~' Nigra, abdomine tarsisque rufis ; alis fusco-hyalinis. <$ . 



Long. 11 millim. 



c > ' Hob. Mexico, Presidio (Forrer). 



Antenna; microscopically pilose ; the third joint about one quarter shorter than the 

 fourth. Head strongly punctured ; the face and clypeus bearing long whitish hair ; 

 eyes at the top separated by the length of the fourth antennal joint. Vertex behind 

 the ocelli depressed, and with a narrow furrow in the centre ; ocellar area raised, also 

 furrowed' in the middle, and there is a wider, but less distinct, furrow in the centre of 

 the front. Clypeus broadly projecting, depressed, and rounded at the apex. Mandibles 

 reddish in the middle. Mesothorax shining, strongly punctured. Metathorax opaque, 

 narrowed towards the apex, coriaceous. Abdomen shining, black at the base in the 

 middle ; the segments laterally bearing a white silky pile. Legs pruinose ; the spurs 

 reddish. Second cubital cellule hardly one fourth longer than the third, and nearly 

 one half longer than the space bounded by the recurrent nervures, that being less than 

 the length of the third cubital cellule at the top. 



^ 3. Larra sonorensis. 



Nigra, punctata ; pleuris opacis, rugosis ; abdomine rttfo ; alis fere hyalinia. $ . 

 ^ Long. 10| millim. 



Hob. Mexico, Northern Sonora {Morrison). 



Very nearly related to L. rufitarsis, but differing in having the tarsi and spurs black ; 

 the pleune opaque, coriaceous ; the clypeus more projecting and more abruptly sloped 



