164 GEO. H. HORN, M. D. 



representation in our fauna (Elithutes, Amphimelltes, Acrocryptifes, 

 Oxygonites and Noitarthrltes), while three additional groups are sug- 

 gested : Fseudolampses, Disonychm (by division of Halticte) and Sys- 

 tems (by division of Crepidoderse). 



Probably the most important character for the subdivision of the 

 groups is found in the structure of the anterior coxal cavities, 

 whether open behind or closed. This seems to divide the entire 

 series in two cohorts containing in each genera which form parallels 

 and agree in the possession of characters of secondary importance. 

 As an illustration we have the Monoplati, Crepidoderse and Chpetoc- 

 nemse with closed cavities, and Pseudolampses, Lacticse and Aph- 

 thonse with closed cavities. 



The character used by Chapuis for the definition of his Amphi- 

 melites (the insertion of the antennae against the inner boi'der of the 

 eye) is open to some objection, as the same is observed in Psylliodes, 

 of which no mention has been made. The latter genus he errone- 

 ously places among those with open front coxal cavities. 



A striking character, in a few (in our fauna) genera, is the abrupt 

 inflation of the last joint of the hind tarsi. In this case the claws 

 are usually smaller and more slender than on the four front feet, and 

 at times simple, while the others may be broadly appendiculate at 

 base. In the vast majority of our genera the claws are appendicu- 

 late, but in the group Aphthonse they are simple ; rarely (Blepharida) 

 the claws are bitid. 



As a rule the posterior tibia, at least, has a terminal spur, althougii 

 several genera are mentioned by Chapuis without, these are not repre- 

 sented in our fauna. It is almost as rare to find genera with spurs 

 to all the tibiae. On this point Chapuis seems to have been confused, 

 as on p. 68 he says of Cceporis: "this character is not otherwise 

 known in the entire subtribe," while on p. 11 he instances Ccfporis 

 and Xuthea, and on p. 21 a group is formed on this character alone, 

 Diamphidiites. Among our genera Blepharlda and Hemiglyptics 

 have s|)urs to all the tibiae. 



A character of no small importance is found in the impressed lines 

 at the base of the thorax. Here Chapuis has been especially vague, 

 and it has been found extremely inconvenient to retain his groups 

 Halticte and Crepidodera3 as constituted each to contain genera with- 

 out the least trace of a groove. 



The other characters made use of in the following tables seem 

 suflSciently plain without further explanation. 



