March, i9i6.] HeBARD : GeNUS StENOPELMATUS. 81 



the same size and from the same lot, correctly recorded by Rehn as 

 longispina, bears the same labelling. From the series now at hand it 

 is evident that the range of longispina does not extend far inland 

 from the Pacific coast. Brunner's record of the synonymous irregu- 

 laris from Arizona, will probably be found to apply to S. fnscus. 



The present species is decidedly the largest known of the genus. 

 In specimens of maximum size, the head is extremely large but no 

 indication of an abnormally bulbous occiput or protruding eyes is 

 shown, a condition frequent in fuscus. In the immature stages the 

 head is not as large proportionately as in the adult and the pronotum 

 in consequence does not expand as much cephalad. As discussed 

 under fuscus, the later instars preceding maturity might easily be 

 mistaken for the adult condition. 



The caudal tibias have their dorsal surface very weakly concave, 

 this varying slightly in different individuals. The spines and spurs, 

 though varying somewhat both in length and position individually, are 

 more constant than in fuscus. The normal form and armament of 

 the caudal femora is best understood by reference to the figures 

 (plate VII, figs. 8 and 9). The most frequent variation is, in the 

 males, the fifth internal spine equal to or longer than the fourth and the 

 presence often of small supplementary external spines; in the females, 

 absence of the fifth internal spine and presence of small supple- 

 mentary external spines. The length of the limbs and of their spurs 

 shows considerable variation, the longest spur (dorso-internal) of 

 the caudal tibije is, however, very rarely much shorter than the caudal 

 metatarsus. 



The spine count for the dorsal margins of the caudal tibice in the 

 series before us is as follows: 



Number of spines, internal 2-5 3-4 4-4 4-5 5-5 5-6 5-7 



Number of specimens i i 25 6 51 6 i 



Number of spines, external 1-2 2-2 2-3 3-3 3-4 4-4 4-5 



Number of specimens 2 48 21 8 3 8 2 



The specimens marked with an asterisk are probably in the instar 

 preceding maturity. 



Coloration. — Head, pronotum and limbs, antimony yellow. In 

 dark individuals (apparently more often encountered in the female 

 sex) the head and pronotum are mummy brown, the limbs strongly 



