AMERICAN IIYMENOPTERA. 210 



ducetl beneath into a long reciirve<l spine. The four species said to 

 inhabit North America are all unknown to rue. Nothing definite ap- 

 pears to be known of their habits, although they are supposed to be 

 parasitic. The sexes are said to be very dissimilar, so much so that 

 the male was considered by Latreille as a distinct genus — Temjijni — 

 which was arranged among the Scoliid;\;. 



Genus MUTILLA, Linn. 

 The species of this geuus, so i'ar known to me, may be tabulated as 

 follows : 



MA LE S. 



An ten use llabellale I. Ajax. 



Autennse simple. 

 Eyes ovate, more or less acutely emai-ffinate within. 

 Abdomen more or less fulvous or ferruginous. 



Head and thorax black, with pubescence entirely black. 

 Abdominal segments fringed at apex with black pubescence, first seg- 

 ment black 2. Briaxus. 



Abdominal segments fringed at apeyi with golden pubescence: first 



segment l)lack 4. Grotei. 



Head and thorax black, with black and whit<! j)ubescence. 

 Abdominal segments fringed at apex with black pubes- 

 cence .;. hexagoua. 



Abdominal segments fringed at apex with golden j)ubescenee.t. Oajaca. 

 Abdominal segments fringed at apex with silvery white pubes- 

 cence 11. Copano. 



Head black; pro- and mesothorax and abdomen ferruginous : segments 



fringed at apex with black pubescence 7, Sayi. 



Head and thorax above reddish brown, abdomen ferruginous, segments 



fringed at ape.x with black pubescence 6. Promethea. 



Head ochraceous, thora.x black, mesothorax brown; abdomen ferruL;;i- 

 nous, segments fringed at apex with whitish pubescence. S. seaex. 

 Abdomen black, banded with silvery pubescence. 



Head with short gray pubescence; second segment of abdomen suU- 

 opuque, with large coarse punctures; first and second segments 

 with an apical band of silvery pubescence, remaining segments 



with mixed, black and silvery pubescence 'J. scrupea- 



Head with long dense silvery pubescence; pleura and inetathorax also 

 silvery; second segment of abdomen shining, with less coarse 

 punctures; first segment entirely and broad apical margin of 

 second segment silvery, the whole abdomen with long silvery 



pubescence Id. gracilis. 



Eyes circular, convex, polished. 



First abdominal segment small, nodiform, more or less constricted at 

 apex. 

 Head arjd tliorax black, with black pubescence. 



First and second abdominal segments black, remainder with long 

 dense fulvous pubescence. 

 Large; length 10 lines 21. Orcns. 



