1G8 J. L. LECONTE; M. D. 



quite visible along the anterior margin between tbe protborax ami the Jieafl. 

 Elytra with an elongate scutellar excavation, continued along the suture for 

 one-fourth the length, then flattened; sutural region behind the excavation 

 flat, disc of the elytra deeply and widely excavated, outer margin of excava- 

 tion rectilinear, inner margin curved in the arc of a circle. Exposed portion 

 of abdomen not longer than the elytra, sparsely punctulate; hind tibiae 

 broader and more compressed than in the two preceding forms. First joint 

 of bind tarsi compressed, more than twice as wide as the following ones, 

 outer surface concave. Length ] mm. 



One specimen with the two preceding. The differences between 

 this and the preceding prevent me from viewing X. cuuernosa and 

 fossa fa as sexual forms of the same species; but it is quite possible 

 that this genus, living with Termes, may have assumed to some degree 

 the polymorphous characters exemplified in that remarkable type. 

 However that may be, I must be content for the present to describe 

 these three individuals, two % and one 9, under ""separate specific 

 names and to indicate the possibility that with increased knowledge 

 they may be grouped under one. 



L.EPTACI]\rS Er. 



Palpi with last joint acicular; middle cox£e separated by raeso- and 

 metasternum ; front tarsi not dilated. 



\^ Maxillary palpi with fourth joint slender, scarcely shorter than the 



third- lateral margin of protborax acute, not united with the lowpr line; 



head beneath normal 1- flavipes. 



J5, Similar to .4, but fourth joint of maxillary palpi much shorter than the 



third, conical, acute 2. grandiceps. 



f^^ Maxillary palpi with last joint very small, acicular; lateral edge of 



protborax acute 3. bruniiescens n. sp. 



1>. Maxillary palpi with last joint very small, acicular; lateral edge of 



protborax not acute in front of tbe middle. 



Protborax with distinct angles 2. 



Protborax elongate-oval 4. loiigicoIlii«. 



2. — Head coarsely punctured beneath 3. 



Head feebly punctured 6. parens. 



3. — Sides of protborax with confused punctures 4. 



Protborax with dorsal series of punctures 5. 



4._Elytra enlirely piceous black fi. nigripenilis. 



Ferruginous, elytra piceous with broad apical yellow margin; abdomen 



usually piceous 7. riificollis. 



5._Piceous black, protborax with dorsal series of 8—10 punctures; legs pale. 



S. iiigritiiliiM u. s}). 

 Testaceous, smaller, dorsal series of six punctures. ...9. pallidulus n. ?]>. 

 Piceous, protborax with dorsal series of 12—14: punctures; elytra testaceous, 

 dusky towards the base; legs dark, front tarsi somewhat dilated. 



10. seris(tii»i n. sp. 



E.— Maxillary palpi with fourth joint slender, not shorter than the third; 



bead beneath flattened, with marginal lines at the side. ..11. cephalicus n. sp. 



