392 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxii. 



ments being* as follows: Length, pronotum, 9 mm., posterior femora, 

 22.5, ovipositor, 31; width, pronotum, 6,5. 



The very long posterior femora and ovipositor of this specimen 

 give it a very distinctive appearance. The ovipositor is slightly more 

 strongly curved downward apically and the pronotum is broader 

 than usual. I refrain from giving it at least a varietal name only 

 because of the unusual range of variation of size among- the specimens 

 of the species studied. Except in pronotal leng-th it represents the 

 maximum measurements made, aside from it the largest measurements 

 made of female specimens being as follows: 



Length, pronotum, 8.75-9.5 mm. ; posterior femora, 21.5; ovipositor, 

 28; width, pronotum, 5,5, 



The male of this species has never been described, though the male 

 of the following variety has been recorded but not described, 



PLAGIOSTIRA ALBONOTATA var. BREVIPES, new variety. 



Description . — This variety is characterized b}" the short posterior 

 femora. It is of a more robust form than the typical variety. The 

 wings of the two specimens examined are thrust out at right angles to 

 the el3^tra, their coal-black color very conspicuous against the yellow- 

 ish brown background. The measurements are as follows: 



Measurements. — Length, pronotum, male 8.5 mm,, female 9; pos- 

 terior femora, male 15, female 16; elytra, beyond the pronotum, male 

 4, female 3; ovipositor, 22; width, pronotum, male and female, 5, 



Type.—G^t. No. 10187, U. S. National Museum. 



Specimens examined. — One male, one female, Williams, Arizona, 

 July 24, 1901, collected on sagebrush by H. Barber. 



The above are the specimens recorded by me "- some time ago as P. 

 albonotata. This variet}^ may eventually prove to be worthy of spe- 

 cific distinction, but in view of the extraordinary range of size of the 

 specimens of the genius studied it is thought better to give it only 

 varietal rank at this time, 



PLAGIOSTIRA GILLETTE!, new species. 



Description. — Male; female unknown. Head scarcely as broad as 

 the anterior portion of the pronotum, into which it is deeph' inserted; 

 vertex scarcely raised out of the general contour of the head very nar- 

 row and not at all prominent; the eyes are moderatel}^ large and ver}" 

 prominent; basal segment of the antenna fully as large as the vertex 

 as viewed from in front, Pronotum unusually large, distinctl}" broader 

 in the middle than at either end; lateral carina^ bowed very noticeably 

 outward, giving the pronotal disk somewhat the appearance of that 

 of the members of the genus Aglaothorax (fig, 77), except it is flat 



«Proc, U. S. Nat, Mus,, XXVI, 1903, p. 897, 



