446 SNODGRASS 



any stripes on either the head or the thorax. The posterior tibiae are 

 in all cases colored as in the type^ agreeing in this respect with both 

 the Chatham and the Hood races. In most of the specimens the hind 

 femur has a more or less distinct dark ventral band. It runs forward 

 a varying distance from the lower part of the posterior large spot on 

 the inner surface. In this respect the specimens resemble those from 

 Charles Island. 



Length of tegmina of male^ 13 mm.; oi female^ 18, 17.5, ly^S, 

 17, 17, 18, 15, 18= 17 mm. 



SPHINGONOTUS TETRANESIOTIS HOODENSIS var. nov. 



From Hood Island. . 



Description of the Type. Male. — General coloration very uniform 

 reddish-brown, head and thorax scarcely differentiated in color, dorsal 

 part of metazona a little darker than the other parts. Fore and middle 

 legs almost uniform, spots indistinct. Hind femur pale externally 

 with a few small scattered spots and a row of spots along the lower 

 outer carina ; the interior surface with two black blotches of similar 

 position as in the other forms, the anterior elongated, reaching the 

 trochanter; terminal swelling dusky on inner side; a dusky line along 

 the floor of the ventral groove between the inner lateral and ventral 

 median carinae. Posterior tibia and tarsus colored exactly as in the 

 Chatham type. Tegmina same color as body ; large blotches reduced 

 in size and generally indistinct; smaller quadrate maculations very 

 small and scattered. Abdomen slaty, mottled with dusky ; the terga 

 bordered posteriorly with orange. Length of tegmina, 20 mm. 



Variations (10 specimens). — In color the specimens from Hood 

 Island are very dark dull reddish-brown, resembling in this respect S. 

 tetranesiotis indefatigabilensis., and have all the markings reduced 

 to a minimum, the whole body being nearly uniform. The gen^e are 

 colored the same as the rest of the head Some show the very faintest 

 indications of stripes on the thorax and head, forming the same pattern 

 as in S. trinesiotis. Three of them lack the posterior orange borders 

 of the abdominal terga described for the type. They all agree with 

 the type^ however, in the coloration of the hind tibia and many have 

 the terminal joint of the tarsus greenish. The continuous infuscation 

 of the lower two thirds of the hind tibia is a character possessed by 

 the trinesiotic Chatham race, and by the tetranesiotic Hood and Bar- 

 rington races, but not by any of the others. This character might, 

 therefore, be taken as evidence of a relationship between these three. 

 However, the general resemblance of the Hood and Harrington forms 



