1- PROCEEDINGS OF THE AMERICAN ACADEMY. 



«-. Head as long ae pronotum; fastigium at least a* long beyond narrowest part 

 of *erti reme breadth; last ventral segment of male more produced 



uixl Bomewbal acutely acuminate. 



Bead with a relatively narrow or no occipital median fuscous stripe, which 

 never nearly equals the width of the fastigium. 

 <■'. Fastigium triangular, tbi converging in a nearly straight or only 



Blightly curved line, the tip narrowly rounded a Scudd, 



t'-'. Fastigium semielliptical, the Bides converging with a well rounded curve, 



the tip very broadly and bluntly rounded neomexicana Thorn. 



/.-'. Head with a broad fuscous occipital stripe, almost or quite as broad as tlie 

 greatest width of the fastigium. 

 <•>. Fastigium Bemielliptical and Btrongly rounded apically, tlie sides 



curved • . vigilant Bp. nov. 



<•'-. Fastigium acutely triangular, with the sides straight and the tip hardly 

 blunt vustraln McNeill. 



Mermiria texana Brun. 



I have seen no male of this species. My specimens come from Col- 

 orado, 7000', Morrison, and Coahuila, Mex., Palmer. It was originally 

 described from Texas and the State of Durango, Mex. McNeill i 

 credits it to Arizona. 



Mermiria bivittata (Sen-.). 



I am inclined to think that Brunei- \s M. maculipi nnia must he regarded 

 as at most only a variety of this species ; I have seen it from Texas and 

 Colorado only, and all are females. McNeill accepted it with doubt, and 

 my maculate specimens, including one named by Brunei-, vary in the 

 breadth and arcuation of the fastigium to the same extent as do those 

 undoubtedly to be referred to bivittata. 



Tins is our commonest species, and is wide spread. From east of the 

 Mississippi I have specimens from Georgia only, but numerous speci- 

 mens from Nebraska, Kansas, Colorado, Utah, Arizona, New Mexico, 

 and Texas, and some immature specimens, which may belong here, from 

 Iowa, collected by Allen. McNeill also credits it to Virginia, Illinois, 

 and Nevada. Morse found it common in New Mexico on bunch grass, 

 but it was rather shy and flew freely. 



Mermiria intertexta sp- nov. 



In color, markings, and size this species exactly resembles the preced- 

 ing ; in all specimens seen, however, there is a slender niediodorsal 



fuscous -trip i head and pronotum. The head is distinctly shorter 



than the pronotum, and the fastigium in both sexes is BCarcely broader 



