126 CRESSON TYPES OF HYMENOPTERA 



nigrifrons (Osmia), Trans. Am. Ent. Soc, vii. 103, 9. 



2526. Colorado. In good condition. 

 nigrifrons (Panurgus), Trans. Am. Ent. Soc. vii, 62, d 1 . 



2 161. Texas. In good condition. 

 nitida (Stelis?), Trans. Am. Ent. Soc, vii, 92, 9. 



2479. New York. In good condition. 

 nupta (Megachile), Trans. Am. Ent. Soc, i\ , 268, 9. 



2449. Texas. In good condition. 

 obliterata (Nomada), Proc Ent. Soc. Phil., ii, 301, 9. 



2557. District of Columbia. Left antenna off beyond joint three. 

 obscurata (Perdita), Trans. Am. Ent. Soc, vii, 70, 9 d\ 



2208 9. Georgia. In good condition. 

 obscurellus (Calliopsis), Trans. Am. Ent. Soc. vii, 201, 9 d\ 



2201 9 • California. In good condition. 

 obsoleta (Monumetha), Proc Ent. Soc. Phil., ii, 388, tf. 



2255. Great Slave Lake, Hudson Bay Territory. In good condition. 

 occidentale (Anthidium), Trans. Am. Ent. Soc, i, 386, 9 J> . 



2394 ?• New Mexico. In good condition. 

 occiden talis (Anthophora), Trans. Am. Ent. Soc, ii, 292, 9 d\ 



2277 9 • Colorado. In good condition. 

 occiden talis (Epeolus), Trans. Am. Ent. Soc, vii, 87 , 9 d". 



2224 9 . Colorado. Left antenna off beyond joint three. 

 olivacea (Melissodes), Proc. Acad. Nat. Sci. Phil., 1878, 216, 9 d". 



2 339 9 ■ Mexico. In good condition. 

 opposita (Nomada), Trans. Am. Ent. Soc," vii, 73, 9. 



2590. California. Left antenna off. 

 Optiva (Megachile), Trans. Am. Ent. Soc. iv, 268, 9. 



2445. Texas. Both antennae broken. 

 oregonensis (Bombus), Proc. Acad. Nat. Sci. Phil., 1878, 185, d\ 



2640. Oregon. Flagellum of left antenna off. 

 ornatipes (Panurgus), Trans. Am. Ent. Soc, iv, 260, d\ 



2205. Texas. In good condition. 

 osmoides (Megachile), Trans. Am. Ent. Soc, iv, 269, 9 d\ 



2247 9. Texas. In good condition. 

 otomita (Centris), Trans. Am. Ent. Soc, vii, 214, d\ 



2627. Mexico. In good condition. 

 otomita (Coelioxys), Trans. Am. Ent. Soc, vii, 101, 9. 



2506. Mexico. In good condition. 

 Otomita (Exomalopsis) , Trans. Am. Ent. Soc, vii, 133, 9. 



2369. Mexico. In good condition. 

 otomita (Megachile), Trans. Am. Ent. Soc, vii, 123, <j\ 



2417. Mexico. In good condition. 

 otomita (Melissodes), Proc Acad. Nat. Sci. Phil., 187S, 209, d". 



2325. Mexico. Tip of right antenna off. 



