14 MEMOIRS ON THE COLEOPTERA 



28 Viridisticta group. 



The species here are among the most minute of the genus, rather 

 slender, usually with the angulate fascia and apical lunule distinct 

 and often with a small discal pale spot near basal third, the punc- 

 tures conspicuously blue or green. Viridisticta does not occur 

 north of Mexico and our species, generally so identified, is arizonensis 

 Bates. The beautiful little Cuban viridicollis Dej., also belongs 

 here and I also have two examples of a Panama species which is 

 closely allied but very differently colored. 



29 Abdominalis group. 



The abdomen in this group is generally red, as it is in all the suc- 

 ceeding groups except flavopunctata, where it is only occasionally 

 red and in lemniscata, which I prefer to place last in the series. The 

 surface is polished in this group as in the severa group, and the sub- 

 sutural line of fovese is even more developed; the species are of 

 very small size and are subglabrous. Those forms known thus 

 far are abdominalis Fabr., scabrosa Schaupp, extemiata* and faceta*. 



30 Politula group. 



This group has the body much broader than in the three or four 

 preceding, nearly as in the rufiventris group in this respect, but with 

 the surface polished as in the preceding and not dull as in all the 

 following except lemniscata. It is also distinguishable by an 

 absence of all pale maculation, excepting an apical lunule, which 

 may be only partially represented or wanting. The specific or sub- 

 spec'fic forms are politula Lee., and cribrum*. 



31 Rufiventris group. 



The type of rufiventris Dej., as explained by Bates (Tr. Ent. Soc. 

 Lond., 1890, p. 503) is from St. Domingo; it has a complete 

 apical lunule and three detached spots in triangle on each elytron. 

 It is possible of course that Dejean's type was not correctly labeled, 

 for we have a form in Pennsylvania and Ohio which has a complete 

 apical lunule and the three more anterior spots as the sole macula- 

 tion, excepting a small humeral spot, and this has always been 

 identified in our collections as rufiventris Dej. The normal macu- 

 lation of the group consists of a humeral and an apical lunule, 



