ART. 9 



SCORPIONS OF WESTERN UNITED STATES— EWING 21 



anfa swollen vesicle. About 24 teeth in pectmal comb. Length, 



5.2 cm. 



Tijpe locality.— T^^^^V^^ ^'^^'^^ 



Tyve.-C2.t. No. 973, U.S.N.M. 



Description based upon two adult specimens, a part of two lots as 

 follows: One adult and one young from Tempe, Ariz., Mai h 29 

 1^97^. the writer, under a stone in a rocky place, and one adult and 

 '!!Iiu^i::TiL same place, April 1, 1927, by the writer, under 

 stones near a camp of Mexicans. 



CENTRUROIDES OF NORTHERN MEXICO 



In addition to the Centruroides species reported from the western 

 United States in this paper, all of which probably occur in northern 

 Mexico, there are others found there which as far as " do no 

 extend as far north as the United States boundary. These will be 

 mentioned. 



CENTRUROroES SUFFUSUS Pocock 



Judgincr from the material collected by Doctor Baerg in Mesico 

 duugiiit, j-iv^^ , Qfofo n-f Dnranfo. It is the 



this is the common scorpion m the State otUurano 

 Sonoran representatiye of mtfatm, from which it (lifters m havin„ 

 fheTor^albU stripes wider than the median yeU- ~d ^ *>- 

 ins the interocular triangle but shghtly, if at all, darker than the 

 arfa behind the ocular tubercle, as well as in a few other particular. 

 T."ca>Uicandata, but has bright stripes on the abdomen and 



a minute tubercle under the stmg. . . .,, ,„, Thi^ mate- 



Pocock described ™#W as a subspecies of «««*«■ This 'nate^ 

 rial came exclusively from the State of Durango, Mexico. A though 

 compar d w th OeltrurMes elegan. in the original descriirtion the 

 cloTt afiinity of this form is probably with 0. ornate Pocock, of 

 which it might with some propriety be considered a variety. 



CENTRUROIDES ORNATUS Pocock 

 ORNATE SCORPION 



Pocock described this species from Jalisco Sfeico. I' /;> " 

 indistinguishable from his suffu^n.. In fact, the .^"'j 'y""^^ 

 what inclined to consider the common striped scorpion of Duiango, 

 Tf it were to be recognised as only a subspecies, as a subspecies of 

 ILr ather than ^Uatus as was done by Pocock F-ther collect- 

 ing in Central Mexico will throw much light upon the true affinity of 

 "■L«.. One specimen in the Baerg collection from Atotonilco, 

 Mexico, should be referred to this species. 



