128 THE UNIVERSITY SCIENCE BULLETIN. 



longritudinal line; just behind the collum are two very slightly elevated, 

 approximate tubercles; sides before the posterior lobe emarginated, the 

 latero-posterior margins sinuated and the edge recurved. Pectus black, 

 with the margins of the pleural segments fulvous. Legs pale yellow; the 

 knees, tips, and a cloud- upon the femora and the tarsi, dusky. Hemely- 

 tra in the fully winged, fuscous, silvery pubescent, with a large white 

 spot at base, the costal margin and sometimes the inner margin of 

 corium blackish; membrane paler near the tip. Connexivum pale, with 

 a dark spot at the tip of each segment; venter pale fulvous, densely 

 golden pubescent, the sides, superiorly, with a broad, blackish stripe not 

 quite reaching to the tip. The short-winged form has the hemelytra 

 dark brown, with a streak of white at base. 



"Length, 4-5 mm.; width across the humeri, 1-1 ^A mm. 



"Obtained at Fort Defiance, New Mexico. The species is named after 

 Dr. George H. Horn, to whom I am indebted for specimens from Cali- 

 fornia and Arizona." 



Genus RHAGOVELIA Mayr. 1865. 



Broad shouldered bugs of fair to small size, characterized by the 

 long deeply-split terminal segment of the tarsus of the middle leg. 



KEY TO RHAGOVELIA. 



A. Tarsi of front leg 3-segmented, other tarsi 2-segmented (apterous). 

 Hind femora, not spinose. Lead or gray in color. 



R. plumbea Uhl. 



AA. Tarsi 3-segmented on all limbs. 



B. Posterior femora moderately incrassate and spinous in both 

 sexes. Venter depressed at the base in the male. 



R. armata Burn. 



BB. Posterior femora moderately incrassate in the male; more 

 slender in the female. 

 C. Sixth ventral segment broadly flattened along the middle 

 and feebly arcuate; emarginate at the apex. 



R. distincta Champ. 



CC. Sixth ventral segment not broadly flattened along the 

 middle. Strongly arcuate, emarginate at the apex. 



R. obesa Uhl. 



Rhagovelia obesa Uhl. 



Uhl., Proc. Boston Soc. Nat. Hist., vol. XIX, part IV, p. 434. 



"Allied to R. collaris Mayr (Burm.), but differs in the colors, in the 

 more contracted abdomen, with its acutely produced posterior tips of the 

 connexivum, and in the absence of dense long hairs at the tip of venter in 

 the same sex. 



"Brownish, or bronze-black; the under side bluish, sericeous; when 

 very mature less polished, but more densely powdered with bluish, or 

 cinereous bloom. Head black, velvety, the front almost truncated, cin- 

 ereous, with an impressed longitudinal line running almost to the base, a 

 few long hairs about the sides and above; the cranium a little elevated on 

 the middle, extending back in the form of a triangle; the base of the 

 occiput transversely a little carinately elevated. Labrum and lateral 

 lobes yellowish, or rufo-piceous; rostrum black, reaching to the tip of 

 the anterior coxae. Eyes round, brown. Antennae black, excepting the 

 base of the basal joint, less hairy than in R. collaris; the basal joint 

 stoutest, curved, about twice as long as the second joint, the second sub- 



