NO. 1530. THE DECTICIN.E OF NOR TH A MERICA— CA UDELL. 339 



Type. — In the Musuem of Comparative Zoology , Cambridge, Massa- 

 chusetts. 



Sj>eciii)ens escainined.—ThQ type specimen (fig-. 40), a female .taken 

 at Mesilla Park, New Mexico l)v Cockerell, August 12, on Afripfex 

 canescens^ in the Scudder collection at Cambridge, the t3^pe of Rehn's 

 /"*. gracila from Arizona and an apparently full-grown nymph from 

 Phoenix, Arizona (Kunze), in the National Museum. 



The above-mentioned immature specimen was presented by Bruner. 

 It is almost exactly like the type of Rehn's /■*. (/rac//// which was kindly 

 loaned to me for study b}^ Professor Snow of the University of Kansas. 

 After examining the type of Rehn's species I unhesitatingl}^ refer it to 

 the synonom}^ under the present species. Aside from Ijeing more slen- 

 der, due dou])tlessly to inunaturity, it presents no characters of suffi- 

 cient systematic value to warrant its recognition as a distinct species. 



STIPATOR Rehn. 



Or(:7if.s/ic((.s Saussure, Rev. Mag. ZooL, XI, 1859, p. 201 (not of Cabanis, 1851). — 

 Scudder, Guide Orth. N. A., 1897, p. 55; Cat. Ortli. V. S., 1900, p. 76. 



Stipator Rehn, Trans. Amer. Ent. Soc, XXVII, 1900, \). 90; Proc. Acad. Nat. 

 Sei., Philad., 1904 (1904), p. 543.— Kirbv, Syn. Cat. Orth., II, 190(5, j.. 183. 



Desct'iptloit. — Head of moderate size; vertex broad, about on(»-third 

 as broad as the interocular space. Pronotum large and posteriorly 

 moderately produced, rounded above, and without carina? or with l)are 

 traces on the posterior portion, where the disk is sometimes slightly 

 flattened; lateral lobes well developed; prosternum armed with a pair of 

 spines, sometimes short, but usually long, and always distinct. Elj^tra 

 of the female lateral and not, or barely, projecting beyond the pro- 

 notum, of the male overlapping above and projecting beyond the pro- 

 notum a distance equal to one-third the length of the pronotum or less. 

 Legs moderately stout, the posterior femora more than two times as 

 long as the pronotum and much swollen basally; anterior til)ite armed 

 above on the outer margin only with three spines except in S. ainer'i- 

 caniis where l)otii margins are sometimes armed. Supraanal plate 

 small, rectangular in both sexes; cerci round, simple in the female, 

 in the male armed on the inner side with a large tooth; ovipositor 

 curved more or less upward, usually quite noticably so, and varying 

 in length from scarcely one-fourth longer to nearly three times longer 

 than the pronotum. 



Type — Orchesticus americanus Saussure. 



The variation in the armature of the anterior tibiie is apparently 

 confined to the type species, none others examined exhil)iting this 

 peculiarity. This is one of our largest genera, and the species is 

 distributed quite widely over the southern and western United States 

 and at least two species extend into Mexico. The species range in 

 size from the largest to the smallest of our Decticinte. As a rule thev 



