I02 NATURAL HISTORY BULLETIN. 



C. pamphila Chaud. Point Isabel, along the beach, col- 

 lected by Townsend and by myself. June and July. By far 

 the most common tiger-beetle of the region and easily captur- 

 ed. Very variable. The ground color of the elytra may be 

 either brownish, obscure bronzed green or bright green. Re- 

 corded also from Louisiana. Must certainly occur in the state 

 of Tamaulipas, Mexico, though I have seen no specimens. 



CARABID^S. 



Omophron americanum Dej. Rare on banks of resaca in 

 July. Very widely distributed throughout the Mississippi val- 

 ley, west to New Mexico and Colorado, east to New York, 

 New England and Virginia. Also occurs in Canada. 



Calosoma auuocinctum Chaud. (Bull, de la Soc. Imp. 

 Mosc. xxiii., 156.) Two specimens are in my possession, sent 

 from Brownsville by Mr. Frank Armstrong, dated Septem- 

 ber. Prof. Townsend also met with it. Chaudoir's descrip- 

 tion is comparative with an Antillean species. In comparison 

 with C. scrutator it will be seen that aurocinctum is smaller 

 (23 mm.), of a much brighter and clearer green above, not 

 becoming bronzed nor dark blue on the head and the pronotal 

 disk. The sides of the prothorax are more suddenly narrowed 

 behind, the margin less broadly reflexed; the cupreous border, 

 so noticeable in most scrutator is nearly or quite wanting in 

 aurocinctum. The elytral stria? are also much less pronounced, 

 the interstices broader and flatter. The side margin of the 

 elytra is brilliantly reddish-cupreous, but narrow. The spe- 

 cies was originally described from Mexico and the above 

 is the first record of its occurrence in the United States. 



C. macrum Lee. Several specimens sent by Mr. Arm- 

 strong; September. Seems to be confined to Texas if we 

 may judge from the records. 



C. sayi Dej. One specimen, from same source and with 

 same date as above. This is known from most of the Atlantic 

 and middle states as far north as Missouri. I have it from 

 Missouri, Alabama and various localities in Texas. Dr. Horn 

 has recently received specimens from Baja California. 



