AMERICAN HYMENOPTERA. 293 



MUTILLINJE. 



Genus 9ILTILLA Linnaeus. 

 Group grandiceps. 



1. Mutilla gramlicep* Blake (1).* 



The male and female of this species were found running over a 

 sandy and pebbly slope at Austin, Texas. The ground was occu- 

 pied by a colony of ETalietus pruinosus Robertson, which would sug- 

 gest that this species is possibly parasitic on the bee. 



Several specimens, Austin and Fedor, Texas. The upper side of 

 the abdomen varies in color from reddish to black. This species 

 resembles quite closely the ant Pogonomyrmez both in color and 

 movements, and not Attn, as Mr. Fox states. 



Group canadensis. 



2. Mutilla nephele Fox (3). 



Several females from Fedor, Texas, October (Birkman). 



3. ^1 nl ilia canadensis Blake (4). 



This is apparently the commonest species of Mutilla on this con- 

 tinent, as the collection contains more specimens of this than of any 

 other form. We have examined over one hundred specimens from 

 Massachusetts (July-September), Virginia, and Central Texas 

 (April-June). The occurrence of this species with the same bee 

 with which grandiceps associates has been noted in the "Biological 

 Bulletin," June 1903, p. 4. 



Specimens from the south are somewhat smaller and of a purer 

 yellow than those from the east. Examples of an almost piceous 

 color are not rare in the Massachusetts series. 



4. Mutilla scwvolella Ckll. and Casad. (5). 

 One female, Luna, New Mexico (Cockerell). 



5. M ul ills* conl iniia \ Cresson (7). 



A single specimen of this ornate species was secured at Austin, 

 Texas, April 28, 1901. This individual differs from the Coloradan 

 type in that the longer hairs of the metathorax, petiole and legs are 

 glistening white instead of ochraceous. The ground color of the 

 second segment is dark rufous, overlaid with black pubescence, while 

 the pubescence of the J |_- s h a P e d mark is whitish. 



* The parenthetical numbers following tne species refer to Mr. Fox's arrange- 

 ment. 



TRANS. AM. ENT. SOC. XXIX. SEPTEMBER. 1903 



