Till', 



URr;TLER. 



697 



The members of the family are mainly characterized by having 

 the antenna 1 11 -jointed, inserted before and on the inner side of the 

 eyes, srrnile in the females and with fan-like processes (flabellate) 

 in the males of SYoWa/.s-; elytra covering the abdomen, which has 

 five free ventral segments ; front and middle coxa3 conical, promi- 

 nent, the former with large trochantins; hind coxae transverse, di- 

 lated into a small plate partly covering the thighs ; tarsi 5-jointed, 

 claws simple, each pair with a long, hairy pad or cushion (ony- 

 chium) between them. 



The only literature dealing with the North American species is 

 as follows : 



Haldeman. "Observations on the Genus Sandalus," in Proc. 

 Phil. Acad. Nat. Sci., VI, 1853, 362. 



Horn. "Notes on Rhipicerida- " in Trans. Amer. Entom. Soc., 

 IX, 1881, 85-86. 



KEY TO GENERA OF RHIPICERID/E. 



a. Joints of tarsi not lobed; antennae moderately long, serrate in both 



sexes. I. ZENOA. 



aa. Joints of tarsi lobed; antenme short, serrate in the female, flabellate 



in the males. II. SANDALUS. 



I. ZENOA Say. 1835. (Gr., "a stoic.") 



In addition to the characters above mentioned this genus may be 

 known from Sandalus by having the mandibles much smaller, emar- 

 ginate or bifid at tip ; the side pieces of metathorax much narrower, 

 the epimera not visible. One species occurs in the eastern United 

 States. 



1324 (4020). ZENOA PICEA Beauv., Ins. Africa and America 



Elongate-oblong. Uniform dark reddish-or blackish- 

 brown. Antennae Teaching to or slightly beyond the base 

 of thorax, the joints wide, serrate on the inner side. 

 Thorax one-third wider than long, front and hind an- 

 gles prominent; disk with a small rounded impression on 

 each side of the middle and another much larger irregu- 

 lar one at base ; surface finely and evenly punctate. Ely- 

 tra each with four raised lines, the first uniting with the 

 second on apical third, the others uniting near apex ; in- 

 tervals between the lines marked with large, more or 

 less confluent punctures; a short, oblique raised line <iu 

 each side of scutellum. Length 31-15 mm. (Fig. 270.) 

 Vigo, Putnam and Posey counties ; scarce. May 

 2-August 3. Occurs beneath logs and bark in dry 

 upland woods. 



1805, 7. 



(After Horn.) 



