Plate 79 
This plate from Proceedings of the United States National Museum. 
FIGURE PAGE 
1. Bittium mcxicanmn Bartsch .Not in text 
Type. 
2. Bittium qiiadrifilatum Carpenter . 24 
Type. 
3. Bittium qiiadrifilatum Carpenter. 24 
4. Bittium cschrichtii Middendorff .'. 18 
5. Bittium cschrichtii montcreycnsc Bartsch. 19 
Type. 
