( 39S ) 



Synopsis of the Family of Psel aphid J5. 



By Dr. Emil Brendel, of Cedar Rapids, Iowa. 



T. Antennas approximate, inserted beneath, promi- 

 nent, porrected contiguous tubercles. - Pselaphini 



,„ ~) Posterior cox£e distant. 

 a y 



J Tarsi with two equal claws. 



6"" Maxillary palpi, the last two joints similar, in 

 form like the cotyledons of an acorn, without 

 appendages. Antennae robust, moniliform, the 

 last two joints of the max. palpi compressed fu- 

 siform ----- Ceophyllus Le Conte 

 Antennae by the last three joints clavate, the last 

 two joints of max. palpi lunate, the last longer. 



Cedius Le Conte 

 d'" Antennse clavate. Max, palpi, the last three joints 

 with lateral setiform appendages. 



Max. palpi, the last three joints triangular, ap- 

 pendages short - - - Tmesiphorus Le Conte 

 Max. palpi, last three joints oval-transverse, 

 appendages very long - - Ctenistes Reichenbach 

 //' AntenucB monihform. Max. palpi minute, the 

 basal joints hidden, the last two connate, together 

 forming a globular club - - Chennium* Latreille 

 d' Antennse clavate by the last three joints. Max. 

 palpi, last joint elongate with a terminal seta. 



Pyt)ia Casey ; Tvuus Aube 

 AntennjE clavate by the last joint, which is enor- 

 mously enlarged. Max. palpi, last joint very long 

 cylindroid, rounded at top - - Cercocerus Le Conte 



* The genei-a Atinus Horn and Biottis Casey do not differ more from the European 

 S'peciesoi Chennium than these species among themselves: the uncertRinty in respect to the 

 number of palpal joints, being in all the Pselaphida four, does not justify a separation from 

 Latreille's genus. 



