AMERICAN MUTILLID^. 271 



This species has precisely the same geographical distribution as 

 the preceding one. 



31. ornativentris Cresson is synonymous with dubitata, the color 

 of legs and abdomen varying from black to red, or vice versa. 



163. Hutilla iiestor n. sp. 



% .—Head and thorax black, clothed with griseus pubescence, including the 

 first abdominal segment; remainder of abdomen red, clothed with yellowish 

 pubescence; head with deep, separated punctures; scape elongate, curved, but 

 little widened apically, without a brush of dense pubescence; middle segment 

 with a distinct, smooth, shallow channel above in the middle; first abdominal 

 segment slightly longer than it is broad apically, with large, separated punctures, 

 those of the second less strong and sparse medially; remaining segments more 

 finely punctured ; last ventral segment tuberculate ; wings fuscous. Length 

 9 mm. 



Texas. One specimen. Resembles Grotei, but is smaller, scape 

 of antennte different, etc. 



164. Jfliitilla Grotei Bl. 



Mutilla Grotei Blake, Tr. Am. Ent. Soc, iii, p. 228, % , 1871. 



Colorado. I have seen only the unique type of this species. 



165. Itlutilla proiuethea Bl. 



Mntilla promethea Blake, 1. c, p. 229, % . 



Georgia; Florida; Louisiana; Texas. The extent of red and 

 black on thorax is subject to variation. Either this species or jiori- 

 densis is probably the male of euterpe. 



166. I?Iutilla floridensis 61. 



Mntilla floridends Blake, 1. c, vii, p. 249, % , 1879. 



Florida ; Georgia. This is a less hirsute and smaller species than 

 promethea, and the color is of a deeper red. The head varies from 

 black to red. In the shape of first abdominal segment this species 

 stands rather intermediate between the typical forms of group hexa- 

 gona and those of group scrupea. 



167. Mutilla Sayi Bl. 



Mutilla Sayi Blake, 1. c, iii, p. 229, % , 1871. 



Texas; Colorado; Montana. Specimens from the two latter 

 States differ from Texan examples in the lighter wings and greater 

 extent of red on thorax. 



168. Mutilla rufa Lep. 



Mutilla rufa Lepeletier de St. Fargeau, Hist. Nat. Ins. Hymen., iii, p. 631, 

 'J, , 1845; Blake, 1. c, iii, p. 257, -^ , 1871. 



Described originally from Pennsylvania, and Blake gives "Atlan- 

 tic States" as its habitat. There is but one specimen before me 

 and that without locality. 



TRANS. AM. KNT. SOC. XXV. MARCH. 1899. 



