172 



PROCEEDINGS OF THE ACADEMY OF 



[April, 



Figs. 8 and 9. — Tropinotus guarani 

 n. sp. Dorsal view of head and 

 pronotum of male and female 

 types. (X 2.) 



female, the prozonal portion increasing in height caudad but slightly 



sinuate in the female, transverse sulci 

 moderately impressed, the caudal one 

 distinctly sunken into the sides of the 

 crest, prozona somewhat shorter than 

 the metazona; lateral carinse sharp, 

 slightly lamellate caudad, cut by 

 three sulci; lateral lobes with the 

 dorsal length slightly greater than the 

 depth; almost the entire surface of 

 the pronotum is punctate, usually 

 strongly so, and the metazona of the 

 disk, particularly in the male, bears 

 papilliform tubercles. Tegmina slight- 

 ly over twice the length of the prono- 

 tum, rather broad projDortionately, 

 costal margin with a very consider- 

 able proximal lobe, the proximo-distal 

 length of which is not great in pro- 

 portion to the depth ; apex narrowed 

 somewhat, obliquel}'' rotundato-truncate. Prosternal spine com-' 

 pressed, apex narrowed and directed caudad as usual in the genus; 

 interspace between the mesosternal lol^es distinctly longer than broad 

 in the male, subquadrate in the female; interspace between the 

 metasternal lobes small and subquadrate in the male, transverse 

 in the female. Abdomen with the' dorsal segments rugoso-punctate. 

 Cephalic and median limits rather short, the femora of the male, 

 particularly the cephalic, distinctly inflated. Caudal femora robust, 

 the distal portion, however, comparatix'ely slender when the robust 

 proximal two-thirds is considered, the femoral length being about 

 three-fourths that of the tegmina and the greatest width is contained 

 nearly four times in the length, dorsal, ventral and lateral carina^ 

 serrate, particularly the dorsal, paginte with the pattern very dis- 

 tinctly imbricate, the appearance being that of overlapping plates, the 

 shape being also variable and seldom the usual Acrid oid chevron; 

 caudal tibise very slightly shorter than the femora, very slightly 

 sinuate, lateral margins with nine to ten spines, internal margins with 

 ten spines. 



General color bistre mingled and blended with vinaceous-cinnamon 

 in a pattern which presents but few sharply defined contrasts of the 

 two colors. Dorsum of the pronotum in the female margined laterad by 



