OBTHOPTERA. 



Table for separating the Species of Mermiria. 



A 1 . Head shorter than pronotum, or, if (rarely) as long, then the 

 greatest width of the fastigium is greater than its length beyond 

 the narrowest part of the vertex ; last ventral segment of male 

 bluntly acuminate. 

 //. Fastigium less prominent and blunter, its greatest breadth 

 being considerably greater than its length beyond the nar- 

 rowest part of the vertex, especially in the female. 

 c l . Stouter, the hind femora shorter, not reaching the tips of the 

 tegmina in the female ; disc of pronotum, in female, hardly 

 or not more than twice as long as the greatest breadth ; head 



with a broad occipital fuscous band 1. texana, Bruner. 



c\ More slender, the hind femora longer, reaching the tips of 



the tegmina in the female ; disc of pronotum distinctly, 



generally much, more than twice as long as the greatest 



breadth. 



d l . Tegmina distinctly maculate in both sexes ; hind femora, 



both externally and internally, with indications of dusky 



bands; occiput provided with a narrow fuscous band . . [2. maculipennis , Bruner.] 

 d 2 . Tegmina immaculate ; hind femora without dusky bands ; 



occiput lacking the fuscous band [3. bivittata, Serv.] 



b 2 . Fastigium of the vertex more prominent and angulate, its 

 greatest breadth being scarcely greater, even in the female, 

 than its length beyond the narrowest part of the vertex ; disc 

 of pronotum considerably more than twice as long as the 



greatest breadth 4. intertexta, Scudd. 



A 2 . Head as long as pronotum ; fastigium at least as long beyond 

 the narrowest part of the vertex as its extreme breadth, semi- 

 elliptical, the sides converging with a well-rounded curve, the 

 tip broadly rounded ; last ventral segment of male more pro- 

 duced and somewhat acutely acuminate 5. neo-mexicana, Thorn. 



l. Mermiria texana, Bruner. (Tab. I. figg. 19, 19 a, $ .) 



Mermiria texana, Bruner, Proc. U.S. Nat. Mus. xii. pp. 53, 54, t. 1. fig. 11 (1890) 1 ; McNeill, Proc. 

 Dav. Acad. Nat. Sci. vi. p. 206 (1897) 2 ; Scudder, Proc. Amer. Acad. Arts & Sciences, xxxv. 

 p. 42 (1899) 3 . 



Ilab. North Amekica, Colorado, New Mexico, Fort Grant in Arizona 2 , and El Paso 

 in Texas 1 . — Mexico, Montelovez in Coahuila (coll. Scudder), Villa Lerdo in Durango l 

 (coll. Bruner). 



Not represented in the ' Biologia ' Collection. 



