Vol. XXI] ENTOMOLOGICAL NEWS. 2IQ 



the genera composing the family into two divisions. Still 

 there are not wanting suggestions of relation, such apterous 

 genera as Hornia and Sitarobrachys (with short metasterna 

 and overlapping coxae) distinctly recalling Meloine forms. 



From the genera last mentioned with their allies we come 

 without great gaps through the Sitarine group to the Zonitines, 

 such genera as Onychtemis and Stenodera furnishing the pas- 

 sage. 



In the Zonitis group I should mention Deridea and probably 

 Ischna, remarkable on account of their non-pectinate claws. 

 The other genera here are close together, Palaestra for in- 

 stance being only a Zonitis-mimicry of a Lycus, and Nemo- 

 gnatha a Zonitis with specially developed mouth parts. Grada- 

 tions of both these last forms occur. 



The mouth parts, episterna and claws all unite to connect 

 the Zonitines with the Horia group, although the absence of 

 vesicating properties and other features make these last rather 

 distinct. 



The peculiar little group of species now included under the 

 genus Tricrania Lee. is of great significance in any classifica- 

 tion of the family. In some of their features recalling the Si- 

 tarini, they are obviously allied to Horia and Zonitis. The 

 claws of Tricrania sanguinipennis are those of a Cissitcs, while 

 those of stansburii strongly suggest Zonitis. A new genus is 

 required for the proper expression of the relation which these 

 insects hold to the groups mentioned, namely, 



TRICRANIODES Wellm. gen. nov. 



Allied to Tricrania Lee., from which it differs by the claws 

 being simply pectinate with longish regular teeth instead of a 

 double row of short tubercles, and also by the body being 

 winged (it is apterous in sanguinipennis Say., the first described 

 species of the group, and which may now be regarded as the 

 type of Tricrania Lee. s. str.) 



Other characters as in Tricrania Lee. 



Type species Tricrania stansburii Hald. 



The genus is easily distinguished from Tricrania by the ab- 

 sence of wings in the latter. 



