1909.] 



NATURAL SCIENCES OF PHILADELPHIA. 



121 



female of this species were taken near Deming, July 18, while under 

 similar surroundings at Aden a pair were taken on July 21. 



The males are of very similar coloration, the olive green predomi- 

 nating in one or two more than in the others. The females, however, 

 are quite dissimilar, one being pale yellowish-green, the other pale 

 cupreous green like weathered copper. 



The range of this species is now known to extend from Aden, Donna 

 Ana County, New Mexico, to Los Angeles County, California, and 

 from the Grand Canyon region to near the Mexican line. 



Pseudosermyle tenuis n. sp. 



Type: cT ; Franklin Mountains, altitude 4,500 

 feet, near El Paso, El Paso County, Texas. 

 July 9, 1907. Hebard and Rehn. [Hebard 

 Collection.] 



This new form is a most interesting species, 

 allied to P. banksii Caudell, from eastern and 

 east-central Texas. Through the kindness 

 of the describer of banksii I have been able to 

 compare the new form with a typical specimen 

 of his species, from which tenuis differs in the 

 slightly more robust build with slightly shorter 

 legs though the body is slightly longer, in the 

 absence of a median carina from the caudal 

 portion of the occiput, in the smoother proxi- 

 mal antennal joint, in the narrower pronotum 

 which is distinctly constricted cephalad, in 

 the less distinctly keeled meso- and meta- 

 notum, in the less compressed and more in- 

 flated apex of the abdomen, and in the slightly 

 more incurved cerci. 



Size medium; form very elongate, extremely 

 slender. Head slightly longer than the prono- 

 tum, decidedly longer than broad, slightly 

 narrower at the caudal margin than immediately 

 caudad of the eyes, a pair of short low sinuate 

 carinse present mesad and extending caudad 

 as far as between the caudal margin of the eyes, 

 these carinse sharply constricted between the 

 antennae and again slightly constricted at a 

 point between the cephalic margin of the eyes, 

 a slight median carina present between the paired caringe caudad; 



Fig. 2. — Pseudosermyle 

 tenuis n. sp. Dorsal 

 view of type. (Nat- 

 ural size.) 



