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IOWA ACADEMY OF SCIENCE 
. 2. A. AMPLiATA Stal. Mexico. Rare. 
3. A. TABiDA Stah California, Mexico and Central America. 
53. SIND ALA Stal. 
Stal (f) 47; Champion, 2-90. 
This genus differs from its near relative, Sinea, in the unarmed anterior 
tibiae. 
1. S. ACUMINATA UJilev is the only species recorded from North America. Its 
description has not been found. 
54. SINEA Am. et S. 
Am. et S., 375; Stal (f) 67, 70; Champion, 291; Caudell (a), (b). 
This is a group of widely distributed forms all but one of which occurs in 
this territory. Caudell has worked out the synonymy most satisfactorily ah 
though Champion’s work on the genus is also invaluable. The following is an 
adaptation from both these authors, omitting a species and a variety listed by 
Caudell, because they have not been found in North America. 
a. Anterior prothoracic lobe armed on the disc with spines. 
b. Posterior prothoracic lobe armed on the disc with sharp spines. 
c. Anterior femora with the terminal spine of the inner inferior row 
out of alignment, occupying a subdorsal position. 10. complexa Caud. 
cc. Anterior femora with the terminal spine of the inner inferioi* 
row not out of alignment 5. integra Stal. 
bb. Posterior prothoracic lobe unarmed on the disc. 
c. gmall tubercle surmounting gibbosities of posterior prothoracic 
lobe 2. undulata Uhler 
cc. No such tubercle present. 
d. Margins of female abdomen prominently and subangularly un- 
dulate; male abdomen variable 1. diadema Fab. 
dd. Margins of abdomen of both sexes usually very slightly un- 
dulate, entire or with rounded undulations . . 11. confusa Caud. 
aa. Anterior prothoracic lobe armed on the disc with mere tubercles, some- 
times acuminate, usually blunt. 
b. Disc of posterior prothoracic lobe bigibbous; abdomen of both sexes 
abruptly widened behind.. 3. coronata Stal 
bb. Disc of posterior lobe of pronotum transversely convex; unarmed, 
c. Abdomen narrow in male, widened to apex of fourth segment in 
female; third spine of ante-ocular series very long. .4. raptoria Stal 
cc. Abdomen of both sexes widened to apex of fourth segment but 
narrower in male than female. 
d. Head with the.third spine of the ante-ocular series very elongate, 
much longer than the others 6. sanguisuga Stal 
dd. Head with third spine of ante-ocular series not longer than first 
and second, first usually longest. 
e. Spines on head much reduced, third usually only a tubercle; 
abdomen narrowly rounded, lateral angles of pronotum 
moderately acute* 7. dejecta Stal. 
ee. Third spine not reduced to a tubercle. 
f. Abdomen with a broad, pale fascia at extremity of each 
