76 GEO. H. HORN, M. D. 



Female. — Anteniife as in variolosa. Anterior tibise bidentate externally, middle 

 tibia with a very distinct oblique ridge, posterior with a feeble trace of ridge. 



This species might be mistaken for a debiUtated form of variolosa^ 

 but its more slender form and the sexual characters mark it as abun- 

 dantly distinct. 



Occurs near Jacksonville, Florida ; collected by W. H. Ashmead. 



Notes on EI^ATERID^. CEBRIOIVID^., RHIPICERID^ 

 and OASCYLLID^. 



BY GEORGE H. HORN, M. D. 



ELATERID.5;. 



The genera of the above family to which especial reference is made 

 in the following pages, are those considered most closely allied to the 

 Cebrionidae, so close in fact that they may be considered as entirely filling 

 the gap which has been supposed to exist between the two families. 



The notes are necessarily short, full descriptions of the males having 

 already been given, the females as far as known claim more attention 

 and it is hoped that the accompanying figures will give a better idea of 

 these remarkable insects than description alone. 



The females of Apla.^tus and Eufh^sariius are remarkable in having 

 the elytra shorter than the abdomen, but not equally so in all as will be 

 seen by an examination of the figures. 



In the former genus there are but six visible ventral segments while 

 in Eiitliiji^ninnx there are seven. In the 9 of E. lautus however, the 

 abdomen is so extended by the completeness of the egg development, 

 that the membranous segment which is usually subcoxal becomes visible 

 and eight segments appear. In all the females there is a similarity on 

 the dorsal surfiice of the abdomen, eight segments being quite distinctly 

 visible. Nor is this number peculiar to the female, the male having the 

 same but the segments are more membranous. In an examination of 

 several other true Elateridas the number of dorsal segments is eight, 

 therefore the presence of this nvimber in the females of Euthijudnius and 

 ApldstiiR must be dismissed from the category of remarkable characters. 



APHRICUS Lee. 

 Fnmt slightly concave, anterioi'ly slightly arcuate, margined. Labrum short, 

 transverse, emarginate and retracted, the suture distinct. Mandibles moderately 

 prominent and toothed a little in front of middle. Maxillary palpi rather slender, 

 the last three joints subequal, the terminal very little broader at tip. Antenna? 

 sknuler not serrate, two-thirds as long as the body, eleven-jointed, last joint with 

 a distinctly articulated short accessory piece, first joint obconical, slightly curved, 



