158 H. F. JAYNE. 



Ijichnanthe viilpina, Hentz. 



A specimen of this insect has an anomalous ri<i;ht antenna as shown 

 in fif. 8. The first three joints are normal. The fourth, fifth and 

 sixth are fused into one joint twice as long as the third; the seventh 

 appears to he connate with the first joint of the club. 'From the 

 posterior outer border of the long fourth joint near the tip there arises 

 a spherical club of three joints about the length of the third antennal 

 joint. The first joint comprising the pedicle and base of the club, the 

 second the centre, and the last the apex. 



In Dr. Horn's Cabinet. 



Polyphylla (lecenilineafa. Say. 



Fig. 9 represents the right antenna of a specimen of PoJi/pnijlIa 

 decemlineata in which, in addition to the normal structure, the second 

 joint bears a branch anteriorly, consisting of a single free joint which 

 supports two clubs, placed transversely to the normal, of seven lamellae 

 each, united at their bases. The plane of the normal club is per- 

 pendicular to the plane of the abnormal but in the figure the two are 

 represented as in the same plane; the normal branch as seen from the 

 outer side, the abnormal as seen from above. Fig. 9 b, represents the 

 left antenna. The basal joint of the right antenna is somewhat smaller 

 and more inflated than that of the left. The second joint is twice as 

 long as the corresponding one on the left antenna; the outer half of 

 the anterior border being flattened for the insertion of the first joint 

 of the abnormal branch, and its posterior border somewhat sinuate 

 near the tip. The double club on the abnormal branch consists of 

 two sets, of seven lamellae each of unequal size united at their bases 

 at an angle of forty-five degrees, the outer scarcely longer than half 

 the inner and more curved, while the inner is but little shorter than 

 the club of the normal branch but more curved than it. The joint 

 supporting these branches is obcouical and much shorter than the 

 second joint from which it arises. Fig. 9 a, represents the double 

 club as seen from below. The third joint of the normal or posterior 

 branch is in form like that of the left antenna but a fifth shorter. 

 It bears a club of seven lamellae which is dii-ected downward and 

 is about half as long as that of the left side, much narrower and 

 feebly curved. 



The insect is in Dr. LeConte's Cabinet. 



