OF NATURAL HISTOaV. 728 



PROCTOTIUJPES Latr. 



1. 1*. OBSOLKTUS. — Black ; fVcf and ;inti"ini.T honey-yellow. 

 Inhabits Indiana. 



Body polished, black: antonn.Tj honcy-ytdhiw, simple, palpi 

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

 vurc from the radial ccllulo continued to the middle of* the wing; 

 discoidal and anal nerviires hardly distinct : Icet 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 downwanl. 



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



2. P. AHRUPTUS. — Black ; feet and first joint.s of the antennae 

 honey-yellow. 



Inhabits Indiana. 



Body polished, black : antcnnne rather .short, with close set. 

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

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

 length of their breadth : mouth obscurely piceous: 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 sh<irt, bitid 

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

 not well understood. Jurine says that the antennae 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 ha.H 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 pallidus may prove to bo of the same species as [ 279 ] 

 1835.] 



