HEMIPTEKA— HETEROPTERA— LYGiEID^. 405 



17. COPTOCHROMUS gen. nov. (kotttc?, zpc^ju^x). 



Head rounded triangular, fully as long as broad, as broad as the apex 

 of the thorax ; the eyes small, globular, median, the front between them 

 advanced considerably, and roundly angulated ; antennae shorter than in 

 the preceding genus, longer than in the succeeding genera, being longer 

 than head and thorax together, but considerably less than half the length 

 of the body ; first joint distinctly, though not considerably, surpassing the 

 front, the first and second together shorter than the remainder of the 

 antennae, the third and fourth subequal and not at all incrassated. Thorax 

 transverse, considerably less than twice as broad as long, decidedly longer 

 than the head, broadest at the base, the anterior lateral margins strongly 

 rounded, the apex about three-fourths the width of the base ; no noticeable 

 posterior lobe. Legs and hemelytra as in the preceding genus. 



A single species occurs at Florissant. 



CoPTOCHROMUS MANIUM. 



Antennse of nearly uniform diameter throughout. Thorax trapezoidal 

 with the outer anterior angles strongly rounded ; the thorax tapering 

 rapidly only at the extreme apex ; front margin gently emarginate, a very 

 broad, rounded, subtriangular, anterior depression three or four times as 

 broad as long occupying the whole apex ; a distinct median carina ; sur- 

 face smooth. Corium of hemelytra varying from pale testaceous to fuscous, 

 more heavily marked along the costal margin ; the whole surface faintly 

 and uniformly punctate ; membrane clear. 



Length, 46°'"' ; breadth, a"*". 



Florissant. Four specimens, Nos. 5248, 6270, 6449, 9046. 



18. PROLYG^US gen. nov. (7rp6, Lygseus, nom. gen.) 



Body of a very regularly oval form less than twice as long as broad. 

 Head rather small, with the eyes rather narrower than the reduced front of 

 the thorax, as long as broad, the eyes situated in the middle of the head, 

 and the front produced in advance of them as a broad quadrate mass : 

 antennae as long as the head and thorax, the first joint not surpassing, prob- 

 ably just reaching, tho front, the last two longer than the first two joints, 

 subequal and slightly incrassated. Thorax very transverse, neari\- three 



