HEMIPTEKA— HETEROPTEKA— LYG.EID^. 409 



21. CRYPTOCHROMUS gen. nov. («py;rroc, xpf^/^a). 



Body of an oval shape, a very little more than twice as long as broad. 

 Head large, distinctly broader than the apex of the thorax, fully half as 

 broad again as long, the front but slightly advanced before the eyes, very 

 broadly angulate. Eyes very large, half as long as the thorax, hemispher- 

 ical, occupying the entire narrowed side of the head. Antenna? as long as 

 head and thorax, the first joint scarcely surpassing the head, the other 

 joints subequal in length, the second very slender, the fourth distinctly 

 incrassate. Thorax trapezoidal, a little more than twice as broad as long, 

 flattened, bi'oadest at base, narrowing gently in advance, the sides gently 

 arcuate, the apex two-thirds as broad as the base. Corium of hemelytra 

 reaching beyond the middle of the apical half of the abdomen. 



One species only is known, from Florissant. 



Cryptochromus letatus. 



Head, thorax, scutellum, and hemelytra, the latter perhaps to a less 

 extent than the other parts, blackish fuscous, finely and uniformly punctate. 

 Thorax about two and a quarter times as broad as long, the front margin 

 roundly eniarginate, the hind margin transverse, the posterior considerably 

 longer than the anterior lobe ; a slight median sulcation. Corium of heme- 

 lytra strongly infuscated, very long, reaching to the last abdominal joint, 

 the membranal suture very oblique ; abdomen fusco-fuliginous. 



Length, 4.15"™; breadth of thorax, 2'"'"; abdomen, 2. IS""". 



Florissant. One specimen, Nos. 4487 and 11655. 



Subfamily PYRRHOCORINA Stal. 



This peculiar group, by many regarded as deserving family rank, has 

 never before been found fossil. The Florissant beds, however, yield two 

 species, which I have I'eferred to Dysdercus. 



DYSDERCUS Amyot and Serville. 



To this genus, found all over the world, but not so rich in species with 

 us as in the Old World, an inhabitant mostly of warm climates, and repre- 

 sented in the United States only in the southern portion, a couple of Flor- 

 issant forms appear to belong. It lias not before been recognized in a fossil 



