372 PROCEEDINGS OF THE NATIONAL MUSEUM, vol. xxiiri. 



tibiae are armed above on the outer margin with but one spine, the 

 color is a dark brown with lighter mottlings, and the size is still smaller. 



MeasuremenU. — Length, pronotum, 5 mm.; posterior femora, 13; 

 ovipositor, 12.5; width, pronotum at posterior margin, 3. 75. 



Type.—Q^X. No. 10182, U. <8. National Museum. 



Specimeris examined. — The type (lig. 56), one female, Oracle, Ari- 

 zona, June 29 (Schwarz). 



ATELOPLUS SCHWARZI, new species. 



Atelopluis notakiH CAVD-EhL (not Scudder), Proc. II. S. National Museum, XXVI, 

 1903, p. 808.— Reiin (not Scudder), Proc. Acad. Nat. Sci. Philad., 1904, p. 

 574. 



Description. — In general size and appearance resembling A. notatus^ 

 but differs in the following particulars: The cerci of the male are 

 short, being about as broad as long, and are armed at the tip with a 

 very small, inconspicuous blackish tooth (fig. 58); the cerci of the 

 female are about the same length as in notatns., but taper more 

 abruptly, being somewhat l)ulbous basally. The last dorsal abdominal 

 segment of both sexes is more acutely cleft than in notatus and the 

 projections more elongate. Legs armed about as in notatus, l)ut the 

 anterior tibit\3 of both sexes in all specimens examined are armed above 

 with a single subapical spine. Color like that of notatus, except the 



dorsal stripe is not present in either sex 



and the posterior femora 'are not tipped 



with black. 



3/e a sure m e n t s. — Length ," pronotum, 



male, 6.5 mm., female, 7-7.5; posterior 

 PIGS. 57,58.-ateloplus SCHWARZI. femora, male, 15, female, 19-20; ovipos- 



57, CERCUS OF IMMATURE MALE. 58, . • 1 1 • 



cERcus OF ADULT MALE. itor, I'l—lS; Width, pronotuuiat posterior 



border, male, 4.5, female, 5.5. 



Type.— C^i. No. 10180, U. 8. National Museum. 



Specimens examined. — One adult male, one adult female, types, and 

 one immature female from Tinajas Altas, Arizona (McGee); one adult 

 female, one immature male and two immature females. Hot Springs, 

 Arizona, June 21 (Barber and Schwarz); one immature male, Santa 

 Rita Mountains, Arizona, June 22 (Barber and Schwarz); and one 

 immature female. Phoenix, Arizona (Cordley). 



This species superficiall}^ resembles notatus, but the black-tipped 

 femora of the latter and, especially, the form of the male cerci veiy 

 readily serve for their separation. The cerci of immature female speci- 

 mens of schwarsi often taper gradually as in notatus and variation will 

 probably be found to exist in this respect even in mature specimens. 

 The cerci of the immature males are essentially as in the adult speci- 

 mens (fig. 57). 



« The measurements of the female are from two adult specimens, the minimum 

 measurements being taken from the type. 



