PLATE I — continued. 



Fig. 4. — Head of Walking-stick. 



E. SU.- — Epicranial suture present but not so distinct. 



F. — The front bears the ocelli. 



C. — The clypeus. The suture between the front and the clypeus is 

 obsolete, but the invaginations of the tentorium, though faint, are suffi- 

 cient to mark the line of division. Transverse suture of the clypeus 

 visible. 



Ac. — Antecoxal pieces of the mandibles small. 



Tr. — Troehantin of the mandible small but present. 



L. — Labrum present. 



Fig. 5. — Head of Mantis. 



E. SU. — Epicranial suture small and indistinct. 



F. — The front bears the median and paired ocelli. Transverse ridge 

 of front so prominent that it appears at first sight to be division between 

 front and clypeus. 



C. — The clypeus. Presence of tentorium invaginations show that 

 there is a strongly marked suture between the clypeus and front, instead 

 of the upper ridge being the division. Clypeus undivided by sutures. 



Ac— Antecoxal pieces of mandibles small, merely indicated. 



Tr. — Troehantin of mandibles present but very small. 

 Fig. 6. — Head of Dahinia. 



E. SU. — Epicranial suture very indistinct; arms of Y form nearly 

 straight line. Front might easily be considered part of epicranium. 



F. — Front. Ocelli absent. 



At. — Tentorium invaginations discernible. Suture between front and 

 clypeus strongly marked. 



C. — Clypeus divided by transverse suture. 



Ac. — Position of antecoxal pieces apparent. 



L.^-Lahrum apparently consisting of two parts, much like labrum of 

 grasshopper. 



Tr. — Troehantin of mandible present. 



Fig. 7. — Head of Orchelimum. 



E. SU. — Epicranial suture present only as fastigium of vertex (v). 



F. — Front increased by pushing up of E. SU.; bears median ocellus. 



C. — Clypeus. No suture between front and clypeus, but invaginations 

 of tentorium very distinct." No transverse suture dividing clypeus, .,o 

 that front and clypeus appear as one sclerite. 



At. — Tentorium invaginations distinct. 



Ac. — Antecoxal pieces not really discernable; position simply inferred 

 on frontal margin of clypeus. 



Tr.^^Trochantin of mandible present. 



L. — Labrum large. 



