STBONGYLOGASTEB. 17 



The Mexican specimens have the four anterior legs almost devoid of black, and the 

 posterior legs have less black than in the Guatemalan specimens I have described above ; 

 the latter agree with Norton's variety. 



26. Strongylogaster lineatus. 



Strongylogaster lineatus, Norton, Trans. Amer. Ent. Soc. ii. p. 223 l ; Catal. p. 155. 

 Edb. Mexico, Angang (Saussure 1 ). 



27. Strongylogaster nigredo. 



Strongylogaster nigredo, Norton, Trans. Amer. Ent. Soc. ii. p. 223 l ; Catal. p. 155. 



Hob. Mexico, Toluca (Saussure 1 ). 



This species is closely allied to 8. nigricans, but may readily be known from it by 

 the black mouth, collar, and tegulae, by the black hinder legs and coxae, the four anterior 

 legs, too, being for the greater part black. The third cubital cellule is shorter and 

 much wider than the second ; the transverse median nervure is received beyond the 

 middle of the cellule. The frontal area is clearly defined by ridges ; it is truncated 

 behind ; at the apex the sides are angled ; and from the apex of the angle runs a ridge 

 towards the eye ; the apex is straight ; the head projects behind the eyes. The amount 

 of white on the anterior legs appears to vary. 



28. Strongylogaster bicolor. (Tab. II. fig. 4, $ ; 4 a, saw.) 



Niger, ore, tegulis, linea pronoti, femoribus, tibiis tarsisque albis, tarsis posticis tibiarumque apice nigris ; 



clypeo exciso ; alis fere hyalinis. 

 Long, fere 10 millim. 



Hob. Guatemala, Duefias (Champion). 



Frontal area indistinct above, the sides more clearly indicated at apex ; from the 

 apex runs a ridge to the eyes as in S. lineatus ; lateral foveae appearing as longish 

 furrows from this ridge ; central large. Eyes converging. Antennae as long as the 

 abdomen, thickened in the middle, attenuated at the apex ; clypeus sharply incised in 

 the middle; palpi blackish. Legs white; base of coxse, a line behind on the four 

 anterior femora and tibiae, apical three fourths of posterior femora, apical third of 

 hinder tibiae, and tarsi black, save at base ; apex of anterior tarsi fuscous ; spurs black ; 

 claws bifid. The transverse radial nervure is received at apical third of cellule ; second 

 cellule longer than third ; the accessory nervure in hind wing interstitial. The vertex 

 is punctured. On the base of abdomen is a thin white line. 



Differs from S. lineatus in being larger, in having the antennae longer, clypeus 

 incised, wings clearer, and transverse radial received further from third transverse 

 cubital. S. nigricans, again, has the antennae " slender, not longer than the thorax." 



biol. cente.-amee., Hymenopt., May 1883. dd 



