246 PROCEEDINGS OF THE ACADEMY OF [PaRT II 



tal margin, both cephalad and caudad, pale, the tegmina elongate and 

 the wings fully developed. 



Length of body 36, length of pronotum 11, width of pronotum 

 19.8, length of tegmen 35, width of tegmen 15.8 mm. 



The immature condition of this species is extraordinarily hand- 

 some. Though moderately supplied with microscopic spines on 

 the dorsal surface (particularly on the thoracic segments, very spar- 

 ingly on the median segment and proximal abdominal tergites) 

 those Ijefore us have few particles of foreign matter adhering and 

 appear smooth and shining to the naked eye. The general coloration 

 is warm buff, the lamellate margins weakly transparent and light 

 buff, the insect beautifully marked with rich blackish brown, shad- 

 ing to prouts brown as shown by the figure. Adults and immatures 

 may be readily separated from those of Monastria bigiittata (Thun- 

 berg) by the femoral spination. In the present species the cephalic 

 femora have on their ventro-cephalic margin a minute but heavy 

 distal spine, preceded by a few irregularly placed chaetiform spinu- 

 lae; the median and caudal femora bear only a minute but heavy 

 genicular spine. 



Monastria biguttata (Thunberg) 



1826. Blatta biguttata Thunberg, Mem. Acad. Imp. Sci. St. Petersb., X, p. 

 276, pi. 14. [9, Brazil.] 



Tijuca,Rio de Janeiro, Brazil, I cf , 4 juv. 



Adults and immatures may be quickly separated from those of 

 Petasodes mouffeti (Kirby) by the femora, which entirely lack heavy 

 spines, the cephalic femora being supplied distad on the ventro- 

 cephalic margin with minute chaetiform spines and dorsad along the 

 caudal portion of the distal margin with a few similar spinulae. 



All of the juveniles are heavily coated with foreign particles, 

 w^hich gives them a dingy unattractive appearance. These particles 

 are seen under the miscroscope to be adhering to a multitude of 

 closely placed, minute and usually curved spines, which cover the 

 dorsal surface and marginal portions of the ventral surface. A 

 color pattern, somewhat resembling that of juveniles of P. mouffeti, 

 is barely discernible on the dorsal surface of the abdomen through 

 its dingy coating. 



CORYDIINAE. 



CEUTHOBIELLA new genus. 

 1920. Melestora Hebard (not of Stal), Mem .Am. Ent. Soc, No. 4, p. 121. 



