OF NATURAL HISTORY. 745 



The basal series of transverse norvures is very slightly din- 

 located. 



8. P. BIOUTTATUS Fubr.— The individual described by Fabri- 

 cius appears to be a female. Coquebert pves hn length at nine- 

 twentieths of an inch, but it sunietiiues exceeds half an inch in 

 length. The male is over three-tenths of an inch in lenj^th ; it 

 is destitute of the anterior white striga of the thorax, and the tip 

 of the terguni has a white reflection; tlie posterior half of tho 

 metathorax also has a white reflection. The basal sitIi-* ^f tran-i- 

 verse ncrvures is not dislocated, in this species. 



4. P. LEPIDUS. — Black; abdomen and wings purplish. [304] 

 Inhabits Mexico. 



^ Body black, slightly sericeous: wings dark purplish; bcc- 

 ond and third cubital cellules a little narrowed at the radial cel- 

 lule, particularly the latter, which is less than two-thirds tlic 

 length of the second cellule, in that part; basal scries of trans- 

 verse nervures not dislocated ; metathorax with a very slight re- 

 flection of purplish, and without any impressed line ; the poste- 

 rior edge obviously reflected ; tergum with a distinct purplish re- 

 flection ; beneath black; in a favorable light a very slight pur- 

 plish reflection may be perceived on the thighs. 



Length two-fifths of an inch. 



5. P. 5-NOTATUS. — Tergum on the second segment with two 

 white spots; third segment with a white interrupted band. 



Inhabits Indiana. 



9 Body black; head with a slight white reflection ])ef(ire ; and 

 a very slender white line on the posterior orbit : wings on the 

 apical margin black; basal series of transverse ncrvures not dis- 

 located ; tergum with a white dot each side before the miildle, on 

 the second segment : third segment with a white, interrupted 

 band at base, on the fourth segment at base is an obsolete, whit- 

 ish spot each side, sometimes wanting ; anal segment with a white 

 spot at base. 



Length two-fifths of an inch. 



Kescmbles hi<juttatus Fabr., but is distinguished by the two or 

 four more white spots on the tergum, as well as by the white spot 

 on the anal segment. 

 lJ<3r).] 



