NORTH AMERICAN HYMENOPTERA. 193 



Genus 1, PSAMMOTHERMA Latr. 



This is distinguished from all the other genera of Mutillidae by 

 the male antenna? being flabellate. The neuration of the anterior 

 wing is much like that of the first division of the next genus (fig. 1), 

 except that the third submarginal cell is not hexagonal, but rather 

 subtriangular, shaped considerably like that of occidental^ (fig. 2). 



This is only the second species of this genus so far known, the first 

 being from Senegal, the P. flabelkda Latr., which differs by the second 

 abdominal segment beino- ferruginous. 



Fig. l. 



Psamm other ma ajax Blake. 



Male.— Black ; head round, densely punctured, mouth clothed with pale goldeu 

 hairs, mandibles black ; antenna? : scape finely punctured, clothed with pale 

 glittering hairs ; flagellum consisting of eleven joints, ten of which are strongly 

 bipectinate ; eyes ovate ; thorax elongate quadrate, rounded in front, pro- and 

 anterior half of the mesothoracic disc rufo-ferruginous, coarsely punctured, the 

 latter having two longitudinal, deeply-impressed lines, scutellum black, rounded, 

 closely punctured, post-scutellar groove distinct, metathorax roundly, truncate. 

 coarsely and deeply reticulate; tegula? rufo-ferruginous, produced posteriorly, 

 finely punctured ; wings ample, fuliginous, paler towards the base of the externo- 

 median cell ; marginal cell ovate, rounded at, and narrowed to tip, first submar- 

 ginal large, second elongate subquadrate, acutely pointed towards the base, its 

 apical nervure sinuate, and receiving the first recurrent at middle, third sub- 

 hexagonal receiving the second recurrent a little before the apical nervure, which 

 is sinuate, its external angles with abbreviated nervures; legs black, clothed 

 with glittering hairs, calcaria pale ; abdomen ovate, basal segment campanulate. 

 closely punctured, its apical margin clothed with pale yellowish pubescence, 

 second segment shining, moderately closely punctured, interspersed with a few 

 erect hairs, the apical margin adorned with a band of pale golden pubescence : 

 apical segments black. Length 12 mm. ; expanse of wings 22.5 mm. 



Hab. — Florida. Harris collection. 



This species agrees with Fabricius' description of M. (Psammo- 

 therma) flabelkda, while St. Fargeau describes the second abdominal 

 segment as rufous. They can scarcely be identical, the latter species 

 being from Senegal. 



TRANS. AMEE. EXT. SOC. XIII. (25) AUGUST, 1886. 



