ORTiioi'TERA BLATTARIJ:. 215 



Antenna; rather stout, the basal joint stout and tapering, the second short, 

 the third, fourth, and fifth subequal, the fourth as long as and the sixth 

 longer than the first and cylindrical. Pronotum subquadrate, broadening 

 a little and regularly from in front backward, the angles well rounded off, 

 at its broadest a little narrower than the head, with a median impressed line. 

 The specimens hardly show with certainty whether the species was winged 

 or not, but there are some signs which can hardly be satisfactorily explained 

 unless it were provided at least with tegmina and that the tegmina were 

 obliquely truncate at the tip, so as to form an obtuse angle with each other 

 when closed, the angle open backward. Metathorax considerably broader 

 than the head. Legs rather short and rather slender, the tibia; more than half 

 as broad as the femora. Abdomen rather long and slender, with parallel sides, 

 of about the same width as the metathorax, the segments subequal, about 

 three times as broad as long, the whole surface very weakly and distantly 

 punctate. The last segments, seventh to ninth, decrease rapidly in size, 

 together forming a half circle, so round and regular is the curve of the ex- 

 tremity of the bod}-. There is a small, bluntly rounded pygidiutn. The 

 forceps ot the male are very slender, almost as slender as the antenna;, 

 cylindrical, equal nearly to the tip, about as long as the last five segments, 

 the extreme base directed inward, beyond nearly straight and slightly di- 

 vergent, the apical fourth incurving slightly and tapering a very little to a 

 blunt point. 



Length of body, excluding forceps, 10.25 mra ; of forceps, 3.4""". 



Florissant. Five specimens, Nos. 5004, 6318, 7118, 11674, 14471 (/). 



Family BLATTARI^E Latreille. 



Although this group of Orthoptera is the most richly represented of 

 all insects in the Paleozoic series, and has a great variety of forms in the 

 Secondary rocks, most of which are much more nearly related to existing 

 types than their predecessors of Carboniferous and Permian times, yet very 

 few species, and those imperfectly preserved, are known from the Tertuiries. 

 A tew specie- occur in amber, and two or three others in various deposits. 

 Only three species have been found in this country, and no one of them is 

 well preserved. They all appear, however, to belong to American types, 

 and to such as are now found only in the warmer regions. (.Tune, 1884.) 



