July, '07] ENTOMOLOGICAL NEWS. 303 



posterior tridentate, 4eeth of middle and hind tibiae long and acute, 

 except the basal tooth on middle tibiae, which is small. Length, from 

 apical margin of thorax to apex of elytral suture, 8.5 mm. 

 Habitat. — Santa Rosa, Lower California. 



I take great pleasure in dedicating this interesting species 

 to my friend, Mr. Gustav Beyer, to whom we are indebted 

 for this and many other additions to our fauna. 



The lateral transverse grooves of thorax and the basally 

 dilated mandibles distinguish this species from any of those 

 known to occur within our fauna. The Mexican dorcoides has 

 the thorax similarly grooved, but the mandibles have a blunt 

 tooth at base and are serrulate inside, while in beyeri the 

 mandibles are broadly dilated at base with one obtuse tooth 

 above the dilatation, the apical part of the inner edge above 

 the tooth is smooth, showing no sign of irregularity in any of 

 the specimens examined. 



The presence of a supra-orbital stria, which is used by 

 Dr. Horn in his synoptic table in separating yucateca and cacti 

 from the rest of our species is in these fairly constant, but is 

 variable in length in pervalida and short, basal in vernicis, 

 but also visible at base in quadridcntata and vicina, while in 

 fossularis, lucida and populnca not the slightest trace can 

 be found. The three last mentioned species have above each 

 eye an almost semi-circular, fovea-like distinct impression, the 

 form is more depressed and the presternum broad and flat. 

 They belong to Hololepta proper, while the rest of our species 

 belong to the subgenus Lioderma. These latter have instead 

 the fovea-like impression, a slightly depressed, coarsely punc- 

 tured space above each eye, from which the supra-orbital 

 stria? start. 



Th labrum in quadridcntata is said to be carinatc, which 

 is not quite correct. The greatest part of the labrum at middle 

 is deeply depressed, especially in front, consequently the sides 

 being more elevated, from a certain point of view, give the 

 appearance of being carinate on each side. 



Table of the Species of Hololepta. 

 First and second elytral striae continued along basal margin forming 

 a basal stria, which generally extends to the scutellum. 



pervalida Blaisd. 



