30 



HVMENOPTERA ACVLEATA. 



Formicoxenus and also in Anergates. The latter genus 

 however has uot yet occurred in this country. PupiB 

 always naked. 



(12) 1. 



(3) 2. 

 (2) 3. 



(5) 4. 



(4) 5. 

 (7) 6. 



(6) 7. 

 (9) 8. 



(J first joint of flagellum simple, 5 and 



J with propodeal spines. 

 Second node of the petiole spined beneath, 



cJ apterous Formicoxekus. 



J" winged, 5 and J with the second node 



of the petiole simple. 

 (^ wings dark fuscous, $ and 5 second 



node of petiole subquadrate . . . Myrmecina. 

 (J wings not dark fuscous, ? and J 



second node much widened posteriorly. 

 Apical nerve of submarginal cell in cj and 



$ divided by a transverse nervure, last 



three joints of flagellum in the 5 ^'^^ 



nearly so long as its remainder . . Myhmica. 

 Apical nerve of submargin al cell not divided 



by a transverse nervure, last three joints 



of flagellum as long as or nearly as long 



as the remainder. 

 ($ antennte ten-jointed, 9 ^'i'^ 5 



with the clypeus raised at the sides 



posteriorly, the carina thus formed 



limiting the antennary cavities 



anteriorly Tetramorium. 



(^ antennce 12-13 jointed, ? and 5 



clypeus simple. 

 (J frontal area distinct, wings dusky, ? 



and 9 club of antennae not very distinct, 



hairs simple Stenamma. 



(J frontal area not defined, wings hyaline, 

 J and 5 hairs thickened towards the 



apes, antennal club niore distinct . Leptothorax. 



(J first joint of flagellum thickened and 



globular, 5 ^^d $ without propodeal 



spines Solenopsis. 



FORMICOXENUS, Mayr. 

 (J apterons, similar to the $ in general appearance, ? 

 winged, although more commonly met with in the apterous 

 state, maxillary palpi four-jointed, labial palpi three- 

 jointed ; ocelli present in the c? and ? , and more or less 

 developed in some of the $ , antennre twelve-jointed in the 

 (S , eleven-jointed in the ? and 9, thorax widest in front 

 and constricted behind the middle in the c? and ?, widest 

 across the middle in the ? , propndeum spined in both 



