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OF NATURAL HISTORY. 725 



PROCTOTRUPES Latr. 



1. P. OBSOLETUS. — Black; feet and antennae honey-yellow. 

 Inhabits Indiana. 



Body polished, black: antennae honey-yellow, simple, palpi 

 white : thorax with a yellowish wing-seale : wings hyaline ; ner- 

 vure from the radial cellule continued to the middle of the wing ; 

 discoidal and anal nervures hardly distinct : feet honey-yellow : 

 oviduct about as [378] long as the first joint of the posterior 

 tarsi, gradually attenuating from the abdomen to the tip, and 

 continuing the curve of the tergum downward. 



Length to the tip of the oviduct nearly one-fifth of an inch. 



2. P, ABRUPTUS. — Black; feet and first joints of the antennae 

 honey-yellow. 



Inhabits Indiana. 



Body polished, black : antennas rather short, with close set, 

 short, obvious hairs ; two or three basal joints very obscurely 

 honey-yellow or pieeous ; joints beyond the middle not twice the 

 length of their breadth : mouth obscurely pieeous: wings hyaline ; 

 nervure of the radial cellule not extended toward the middle of 

 the wing; discoidal and anal nervures not obvious; wing-scale 

 dull yellowish : feet honey-yellow : oviduct curved rapidly down- 

 ward, almost deflected, not gradually attenuated, but somewhat 

 cylindric at base, and hardly longer than the basal joint of the 

 posterior tarsi. 



Length one-tenth of an inch. 



3. P. PALLIDUS nob. Contrib. Macl. Lye. vol. i. p. 80. 



This species is remarkable in having but a very short, bifid 

 process extending from the tip of the abdomen. The sexes are 

 not well understood. Jurine saj'S that the antennjie have the 

 same number of joints, and that the pointed valves which termi- 

 nate the abdomen are nearly alike in both sexes. But the pre- 

 sent insect leads me to suppose that the male has not been 

 hitherto known. At the extremity of its abdomen are two very 

 short, parallel filiform processes, which are probably character- 

 istic of the male sex in this genus. It seems, therefore, possible 

 that the pallklus may prove to be of the same species as [ 279 ] 

 1835.] 



