ClCINDELIDyE AND CARABID^ 15 



an obliquely sigmoid median band, a subapical spot near the 

 outer end of the apical lunule and a marginal spot near apical 

 third. According to Bates the true i6-punctata of Klug (rubri- 

 ventris Chev.) is 9-10 mm. in length, generally dark and bluish 

 in tint and the markings form on each elytron eight equal-sized 

 spots, the two median sometimes connected by a thin line. It 

 occurs chiefly in the vicinity of the City of Mexico. The labrum 

 is scarcely at all produced in the middle, even in the female. 

 This definition does not suit the Arizona and New Mexican form 

 that we are accustomed to call i6-punctata, as in fact is recognized 

 by Bates (1. c.), but he does not designate this form by name. 

 Our species and subspecies of this group are numerous and com- 

 prise rujwentris and hentzi Dej., cumatilis and hcemorrhagica Lee., 

 padfica Schaupp, and arizonce Wick.; also woodgatei*, collusor*, 

 and sonorana* described below. 



32 Flavopunctata group. 



The chief differences between this group and the preceding 

 lie in the usually black abdomen, in the absence of the marginal 

 spot of the elytra near apical third and the presence of only the 

 outer end of the apical lunule, which forms a clearly denned rounded 

 marginal spot; it is essentially a neotropical group, only one species 

 crossing the Mexican border into Texas the rectilatera of Chau- 

 doir. I have also a good series of chiapana Bates, from Hunduras, 

 and of an undescribed but very similar form from Guerrero. The 

 dark abdomen in rectilatera misled Mr. Leng, who placed the 

 species far out of its proper position in the series. Chiapana Bates, 

 is almost perfectly similar though much smaller and has a bright 

 red abdomen as in the rufiventris group. The color of the abdomen 

 also becomes largely pale in some Mexican forms of the repanda 

 group; so the pale color of the abdomen is not a group character. 



33 Sommeri group. 



This group is closely allied to the preceding but the hind body is 

 more inflated and the elytral markings become very broad and 

 confluent, consisting of a broad but short humeral lunule, a broad 

 straight oblique fascia from the margin nearly to the suture and a 

 arge circular marginal spot in the same position as the subapical 



