GEOLOGICAL SURVEY OF THE TEEEITOEIES. 437 



SegraeBts 2-8 liave on each, near the posterior margin, a single row of 

 wliite dots. Posterior femora marked on the upper x^art of the disk Tivith 

 oblique, brown, scabrous lines; along the middle of the disk runs a 

 slight sulcus, which is bordered by a stripe of brownish scabrous points ; 

 there is also another short stripe of the same, each side of the sulcus^ 

 near the apex. Posterior tibite. striped with brown in front. 



Dimensions. — Length, .5 inch; posterior femora, .43 inch; posterior 

 tibiae, .43 inch. . From California. Presented by j\Ir. Taylor. 



C. hilohatus, nov. sp. 



Male. — Femora unarmed. Posterior tibiae multispiued ; spines alter- 

 nately long and short. Frontal tubercle bilobed. Yenter bright yellow; 

 ultimate segment with a black fascia. 



Frontal tubercle deeply bilobed; a transverse impression immediately 

 below it; eyes round, not docked on the inside; third joint of the antennfe 

 not longer than the second. Abdomen faintly keeled on the posterior 

 segments; superanal plate (or last abdominal segment) deeply bilobed ; 

 the short cerci protruding from beneath it by the lateral margins of 

 the lobes at a circular notch ; ultimate ventral segment notched at the 

 tip, and longitudinally sulcate beneath. Femora neither spined nor 

 serrated. Anterior and middle tibiae, although quite hairy, do not 

 appear to be spined or serrated ; i^osterior tibiae not serrated but spined 

 on the posterior margins nearly their entire length, spines nearly op- 

 posite, alternately long and short in each row ; first joint of the posterior 

 tarsi with a strong curved spine above at the aiiex. All the tibiae 

 aj)pear to be square, having four nearly equal flat faces. 



Color, (dry, but not alcoholic.) — General and nearly uniform color an 

 ash-brown, with numerous orange-yellow dots. Tips of the mandibles 

 l)iceous blcick ; a narrow, black, transverse line immediately below the 

 frontal tubercle; eyes brown. Two oblique, short, black stripes on 

 the meso- and meta-notum, diverging posteriorly, one each side reaching 

 across the two segments, Ijordered above, especially on the metanotum, 

 with an orange-yellow stripe. Yenter a bright yellow, the ultimate 

 segment, with a black band across the middle, expanding at the lateral 

 margins. 



Dimensions. — Length, .45 inch ; posterior femora, .28 inch ; posterior 

 tibia?, .26 inch. California. Presented by Mr. Taylor. 



I had a specimen of what I am satisfied was the female of this spe- 

 cies, but, unfortunately, it was destroyed before a description of it was 

 taken. All I can state positively in regard to it is, that the ovipositor 

 was very short, strongly curved upward, falcate. Color more of an 

 ash-gray than the male ; the stripes on the thorax very distinct. About 

 the same size as the male. 



The characters of this species will probably require the formation of 

 a new genus for its reception, but the general appearance is sufficiently 

 near the typical Ceitthojjhili to place it at once in that group ; therefore, 

 rather than multiply generic names, I i^lace it here for the present, but 

 have given a full description, that the generic characters may be known. 



Udeopsylla rohiista, Scudd. 



Syn., Phalangopsis {Daihinia) robusta, Hald. 



I have found this species at a few points in Wyoming, Colorado, 

 Utah, and Southern Idaho. . It appears to be generally distributed on 

 the plains and open sections of the Eocky-Mountain regions, but not 

 abundantly. I have seen very few females. Although the "upper 



