Mar., 1908.J SCHAEFFER : NORTH AMERICAN COPELATI . 17 



Copelatus chevrolatii var. australis, new variety. 



Two forms of C. chevrolatii occur. The dark, piceous specimens 

 have a short apical stria near suture on each elytron in addition to the 

 eight discal strias. These occur in Florida and probably in Georgia 

 and are the typical chevrolatii. The other form, for which I propose 

 the varietal name australis, is pale castaneous, without trace of the 

 short apical stria near suture, and occurs in Texas, New Mexico, Ari- 

 zona and California. Judging from the material before me the differ- 

 ences between the two forms seem to be constant and I have seen one 

 or the other labelled " var." or " //. s/>." in some collections. 



Table of the North American Species of Copelatus. 



1. Each elytron with ten discal striae, the alternate striae more or less abbreviated at 



apex 2 



Each elytron with less than ten discal stria; 3 



2. Front tibiae of male curved at base ; front and middle tarsi of male broadly dilated ; 



thorax in both sexes with short, fine scratches over surface ; elytra at base with 



a transverse ferruginous fascia azlatipennis Aube. 



Front tibiae of male not curved at base, nearly straight, suddenly widening inside 

 from balsal third ; front and middle tarsi of male feebly dilated ; thorax in the 

 female with or without a very few, fine scratches at sides ; color uniform. 



glyphicus Say 

 Front tibiae of male not curved at base, inside gradually widening to apex ; thorax 

 in both sexes with fine scratches which are confined in the male to the sides of 

 thorax but extend over nearly the entire surface in the female. 



impressi collis Sharp. 



3. Each elytron with eight entire striae and an additional short sutural stria, which 



latter never extends over apical half; elytra piceous chevrolatii Aube\ 



Each elytron with eight entire striae ; but without short sutural stria ; elytra pale 

 castaneous var. australis n . var. 



Wishing to compare the Texas and Florida specimens, which I 

 identified as cailatipennis, with specimens from Cuba, I applied for the 

 Cuban species of Copelatus in the collection of the National Museum. 

 The species was, however, not represented in the material, which was 

 kindly sent me by Mr. H. S. Barber, but the following observations 

 made on some of the species may prove to be of some interest. 



Copelatus insolitus Chev., Ann. Fr., 1863, p. 201. 



Three specimens, one male and two females of this species are 

 before me which were collected by H. G. Hubbard in Jamaica, W. I. 

 The female was not known to Chevrolat nor to Dr. Sharp, and as it 

 differs from the male, the following note may be of interest. The 

 male of this species has the elytra without strice, but has a few discal 



