330 Journal New York Entomological Society. 1 Vo1 - xxvu. 



Melasoma (Lina) californica Rog. and arizonae Cr. 



The following new genus is proposed for the reception of these 

 two species which do not belong in the genus Melasoma (Lina), 

 where they are placed in our list. They look, in fact, out of place 

 there. 



Pseudolina new genus. 



Differs from Melasoma (Lina) in having the prothorax arcuately 

 narrowing from base to apex, without longitudinal lateral impression ; 

 the sides of prothorax and elytra not thickened; metasternum broadly 

 arcuate in front, not produced between the midde coxae and the tibia? 

 are not grooved externally, except more or less distinctly at tip. 



Type Plagiodera californica Rog. 



Plagiodera, to which this new genus is also related, has the meta- 

 sternum distinctly produced between the middle coxae as in Melasoma 

 and the elytral epipleurae are deeply, longitudinally excavated. L. 

 ariaonce Cr., which occurs also in Mexico, is placed in the genus 

 Plagiodera by Mr. Jacoby. 



Melasoma tremulae Fab. 



The North American specimens identified as M. tremulce Fab. are 

 in my opinion M. saleceti Reit. At any rate they seem to agree with 

 the description of the latter species better than with the description 

 of M. tremulce. 



Melasoma immaculata new species. 



Ovate, shining ; elytra luteous, immaculate ; scutellum, prothorax at sides 

 pale yellow, at middle and head black with faint metallic tint; antennas pale, 

 first and outer four joints darker; underside pale, except metasternum, a 

 transverse fascia on each ventral segment, which is broadly arcuate at middle, 

 femora, except at base, and apex of tibiae black with more or less metallic 

 green or blue tint. Head broadly impressed at middle ; finely, not closely 

 punctate, with sparser larger punctures intermixed. Prothorax about twice as 

 wide at base as long, sides gradually narrowing from base to a little below 

 apex, then arcuate to apical angles, which are rounded ; basal margin dis- 

 tinctly bisinuate ; apical margin broadly, rather deeply emarginate ; surface 

 on the disk finely punctulate with some sparser, larger punctures intermixed; 

 laterally relatively coarsely punctate, the punctures in the lateral impression 

 rather crowded. Scutellum smooth, shining. Elytra irregularly punctate, 

 punctures not coarse ; the thickened lateral margin smooth. Ventral segments 

 with transverse row of punctures near apex, at sides more or less finely, trans- 

 versely rugose. Length 5.25 mm. 



