98 CHARLES W. LENG. 



Habits. — Nocturnal, lives in holes made in clayey banks of ravines, 

 especially those made by Kangaroo rats ; moves in a peculiar manner, 

 raising its body very high and keeping its antennje in constant motion ; 

 sight very poor ; prey consists of various insects, particularly larvje of 

 Orthoptera and Lepidoptera. 



This insect must always be connected with the name of Prof F. 

 H. Snow of the University of Kansas. From the time of its de- 

 scription by Say until 1876 it was very rare; the Wallace County 

 locality was then discovered by Williston and Brous, and in 1877 

 several hundred specimens were taken thence by Prof. Snow and 

 distributed to various cabinets. Mr. Warren Knaus has since visited 

 the locality and reports that about July 1st the insects, walking 

 along the sides of the clay banks on warm, still evenings, may yet 

 be found though no longer abundantly. 



A. Piccolominii Reiche, 1839, Ann. Fr., p. 560, pi. 19, fig. 1-6, 

 Rivers Zoe, iv, p. 218, pi. 29, differs mainly in being sn)oother and 

 smaller. A specimen in Dr. Leconte's collection from Arizona, one 

 in Mr. Hayward's collection and one taken by Mr. Rivers at Peach 

 Springs, northwest Arizona, are the only individuals known to me. 

 Dr. Leconte, Dr. Horn and Prof Schaupp, regarded the differences 

 presented by the first two specimens as insufficient for specific separ- 

 ation ; but taking into consideration the wide difl^erence in locality, 

 which is important in the case of so slow moving a creature, and 

 the later discovery by Mr. Rivers of still another individual, I am 

 inclined to regard these specimens as indicating a distinct species 

 inhabiting Arizona. 



A. Baroni Rivers, 1890, Ent. Am. vi, p. Ill ; Zoe, iv, p. 218, pi. 

 29. The type was found dead in a canon in Pima Co., southern Ari- 

 zona, at an elevation of 5000 feet, and Mr. Wickham mentions a 

 specimen found by Dr. Edw. D. Peters, Jr., beneath a log lying in 

 a damp spot in the Pinal ^[ountains, north of Tucson, Arizona, in 

 June. I have had no opportunity of examining these insects, but 

 from an examination of photographs sent to me, I should not hesitate 

 to regard Baroni as a valid species. It is much smaller than cylin 

 drifonnis, smoother between the carina, which are well marked, and 

 apparently differs also in the long slender mandibles. I am not 

 unaware that Mr. Rivers at one time regarded Baroni as the other 

 sex o^ Piccolominii, but the differences in punctuation are too great 

 to support this view, and the analogy of sexual differences in eyVui- 

 driformis is directly opposed to it. 



