NO.HS7. NORTH AMERICAN DianER WASPS— FERNALD. 341 



somewhat sericeous above; fore metatarsus with seven long-, slender 

 comb teeth externally ; there is a faint ferruginous tinge to the fore 

 tarsi, particularly to the last segment and claws, which l)ear five teeth; 

 the otiicr tarsi are somewhat more sericeous. (Plate VI, tig. 0.) 



J/^//(.— Dilfers as follows: Clypeus rather broadly emarginate ante- 

 riorly, its notch and depression usually less pronounced; eyes con- 

 vergent somewhat, toward the clypeus; mandibles two toothed, the 

 posterior tooth not nearly as k)ng as in the female, and the whole 

 mandible quite slender; cheeks at their widest place less than half the 

 width of the eye; relative length of filament segments ^^^ -^\ , ^\^ ^*^, ^s^ ; 

 first two filament segments quite short; very delicate transverse acicu- 

 lations present near the middle of the mesonotum; petiole slightly 

 longer than the hindcoxt\3; abdomen slighth^ grayish sericeous above 

 in some lights; fourth and fifth ventral abdominal plates velvety 

 brownish l)lack; the following plates without an excavated hinder 

 margin; terminal plate conical, with a rounded hinder margin. 



In some cases the pubescence on the clypeus and frons is almost 

 golden instead of silvery; the vertex and cheeks are whitish sericeous; 

 the base of the femora may be slightly ferruginous and the front of 

 the abdomen may have a faint ferruginous tinge; eight teeth in the 

 metatarsal com!) have been observed, and the whole body, particu- 

 larly in southern specimens, may have a strong l)rownish tinge. 



Length. — Female, 15-22 mm.; male, 11-19 mm. 



Chlorion {Prlo)wny,c) atratmn appears to be our most generally 

 distributed species of this subfamily in North America except Chlorion 

 {^Proten^osphe.c) ichneumonemn. I have studied nearl}^ four hundred 

 specimens, taken in Maine, New Hampshire, Massachusetts, New 

 York, Ohio, Michig-an, Minnesota, Canada (exact localit} ?), and Mon- 

 tana, but it does not seem to occur in the Northwest Kocky Mountain 

 region. South of these States it seems to )>e everywhere present to 

 the southern limits of the United States. 1 have seen specimens from 

 Alabama, Texas, New Mexico, Arizona, and southern California, ])ut 

 none from Mexico or the West Indies. It is probably found in north- 

 ern Mexico but is not listed in the Biologia Centrali- Americana as 

 having been taken there. It provisions its burrows with grasshoppers 

 (locusts). 



Harris's " Sphex Jalmmi''^ is a female of this species, numbered 123, 

 and in his record book Harris says: "123. Amophila 'i bi])rosus S, Mss. 

 (Allied to Sphex Penselv. L. & 1) Goer but not half as large as is 

 figured by De Geer.) Is it Anunophila ;< I think it is. Milton July 

 15, 1826." Consequently Smith was correct as to the identity of 

 lahrosa with atratum. 



A prolonged study of the t3'pe specimen of Prloiuoiyxhrnniiij^es 

 Cresson gives no structural characters not present in atratum. The 

 distinguishing feature seems to be the decided brownish color which 



