400 ENTOMOLOGICAL NEWS. [March, 



Arrangement of the extra-American Species of Mutilla. 



(Described by Cresson and Blake) according to my classification 



of the Genus. 



By WILLIAM J. Fox. 



In the synopsis entitled "The North American Mutillidse,"* 

 it was found necessary to exclude the Mexican, Central Ameri- 

 can and West Indian species of that family for want of suffi- 

 cient material from those regions. This want has not yet been 

 remedied, and the species noted in these pages practically form 

 the extra-American collection of the genus Rlutilla of the 

 American Entomological Society. While an arrangement of 

 all the known species from the regions mentioned would be of 

 more value, the present limited one will, perhaps, be not en- 

 tirely useless. 



2. Group cauadensis. 



M. izucar, chiapa, anripcs, psammadroma, /en/ia, bisignata,\ 

 gothica, pctricola, ininutissiina, laticeps, .\~alapa, zapoteca, robin- 

 son i, all of Blake. 



3. Group quadridens nova. 



M. quadridens Blake, represents a group not found in the 

 United States, and is another link in the chain that proves the 

 unity of the species of Mufil/a under one genus. In the large 

 spinose head and fiddle-shaped thorax it approaches group 

 canadi-nsis, but it differs in possessing a distinct pygidium, in 

 which characteristic it separates itself from group siinillima ; 

 and in the nodose first abdominal segment it is different from 

 both of these groups. In the latter respect it shows its rela- 

 tion to groups ivaco and asopiis, from both of which it differs in 

 the large spinose head. 



In shape, quadridens and robinsoni are quite similar, but the 

 latter has a sessile first segment. 



5a. Group gabbii nova. 



In the almost edentate mandibles, gabbii Bl. differs from all 

 the preceding groups, but its relation to groups ca/Kidcnsis and 

 siinillinia is shown by the broad, sessile, first abdominal seg- 

 ment. There is no distinct pygidium. 



* Trans. Am. Ent. Soc., xxv, 1898-99. 



t May possibly belong to 3. Group similliniii. 



