NO. 1530. THE DECTICIN.E OF NORTH AMERICA— CAUDELL. 343 



Amcricanus occurs throug'hout the middle and southern United States 

 from Wyomino- and Texas and east to Tennessee. T\w adults appear 

 as early as May in Texas, and specimens in the National Museum from 

 Kansas and Colorado are labeled as having been taken in September. 

 The present species is peculiar in having the anterior tibiiv armed above 

 sometimes on one margin only and sometimes on both margins. Such 

 variability is unknown in any other meml)er of the genus. Little diffi- 

 culty will be found in the identitication of this large insect. The size 

 alone at once separates it from all other species except gran<li'<^nA the 

 color, markings, length of the ovipositor and the structure of the cerci 

 of the male serve to easily separate it from that species. 



The insect here descril)ed is very surely the amerlcanus of Saussure. 

 In his description of the genus OrcJiesticus he describes the pronotum 

 as subcarinate, and this is the only species of the genus known to me of 

 which this is true, nor has an}' other of our species of St ijHitor got ovi- 

 positors long enough to tit the measurements given by Saussure for 

 anierican >/.<;. The sy nonomy of Jtaldemanii and cvKgini with this species 

 has been arrived at l\y a careful studN' of descriptions and illustrations, 

 as well as an exam iiuit ion of types of c'r«(7«r/and specimens of haldemanli 

 in the U. S. Natioiiiil Museum. 



In spite of the somewhat extended bibliography of ameflcGnus there 

 is nothing pul)lished, so far as known to me, bearing upon the life 

 history or habits. 



STIPATOR BRUNERI, new species. 



Descript'uyn. — Head of moderate size, not prominent, quite deeplj- 

 inserted into the pronotum; fastigium prominent, one-third as broad 

 as the interocular space; front as in americanus. Eyes rounded, mod- 

 erately prominent; antenna? very long and slender. Pronotum large 

 and much produced posteriorly; lateral lobes well developed, slightly 

 slanting outward and cpnte strongly sinuous l)ehind; lateral and 

 median carina' not indicated at any point, the pronotal disk smooth 

 and evenly rounded, without transverse sulce or with a very incon- 

 spicuous one; anterior nvargin of the pronotal disk truncate, the pos- 

 terior margin semicircularly rounded; prosternal spines distinct, 

 usually short and somewhat blunt. Wings completely concealed 

 beneath the pronotum in the female, in the male overlapping dor.sally 

 and projecting very little ])eyond the pronotum; anterior tibia? armed 

 above on the outer margin only with three spines; posterior femora 

 long and shaped as in aineruxmus, armed below on the inner carina 

 with several distinct but small spines. Abdomen moderately stout, 

 scarcely carinate; cerci of the male scarcely more than three times 

 as long as the basal width and apically forked, the outer branch blunt 

 and nearly in a line with the main bod}^ of the cercus and the inner 

 branch at a right angle with it and sharp pointed, a little decurved, 



