Huxgkkfokd: Nkpid.?<: in America. 431 



4.5 mm.; at bn^^v ol' I'lonotum. 3.8 mm.; length of appendages, 7.7 mm., Vic- 

 toria. Tox. A single specimen, United States National Museum, Washington. 



Tt) the above description Doctor Montandon adds the following 

 helpful coniparative notes: 



This species is intermediate in size between C. volxemi Montd. and C. 

 Scorpio Stal (.=>nonta)idom Martin). It differs from C. voh-cini Montd. by 

 the iironotiun being sensibly narrowed in front, while in the latter it is almost 

 as wide in front as behind. In this character it approaches more closely to C. 

 Scorpio Stal, which also has the pronotum quite narrowed in front, with the 

 same right-angled anterior angles almost sharp, but its anterior tibife are, 

 however, slightly more elongated than in this latter species; that is to say, 

 much more than in C. volxemi Montd. In the character of the median tooth 

 of the anterior femur being situated closer to the base than the extremity, 

 howe\-er. the species approaches C. scorpio Stal, but it is plainly separated 

 from the latter by its head being longitudinally carinate throughout its entire 

 length, while the head is simply convex between the eyes in C. scorpio Stal 

 and almost plain in C. volxemi Montd. 



Furthermore, in C. scorpio the scutellum is not carinate; the longitudinal 

 grooves of the pronotum are also much less emphasized and the anterior 

 tibiae are more largelj* pale, darker only toward the base. 



This is the first species of the genus found in the United States. It is 

 to b(> ]iresumed, however, that others may occur in the Southern states 

 neighboring to Mexico, where are foimd the two species to which I have 

 just compared it. 



I take pleasure in dedicating this to Mr. L. 0. Howard, as an indeed 

 feeble expression of my sincere gratitude. 



In the collection of Prof. H. G. Barber are three males from 

 Huachuca mountains, Arizona, taken in 1899. They have been 

 compared with the type in the United States National Museum 

 by Dr. Carl Drake, through the kindness of whom I have been 

 privileged to study the structural details of these interesting in- 

 sects. The United States National Museum has a specimen taken 

 by D. C. Van Dine at Camp Travis, Tex., March 30, 1918. 



The species is a compactly built creature. The head is set 

 deeply into the prothorax, the anterior lateral lobes of which are 

 conspicuously swollen and incurved on their anterior tips to em- 

 brace a portion of the eyes. The front of the head appears almost 

 truncate, due to the tylus and juga being about equal. The 

 antennae are small and the lateral prolongation of the penultimate 

 segment short (see fig. 8, pi. XLVII). The pronotum has a broad, 

 prominent elevation throughout its length. On the anterior half 

 of this there is a median longitudinal depression. The genital 

 capsule and its claspers are somewhat different from those of the 

 species described below (see figs. 7 and 8, pi. XLV) , but the specific 

 differences are not great. 



