1911.] 3 



now difficult to obtain, and iiiiich helpful correspondence. Dr. Sharp 

 placed vmreservedly at my disposal an enormous amount of material, 

 a good deal of it datin<; back to the sixties, and both Mr. Champion 

 and. Commander Walker have, as usual, been laid under contribution. 



The following is a table of our species of the genus : — 



1 (6) Elytra with subregiilar rows of sliallow pviuotiires. 



2 (3) Base of thorax without a longitudinal impression opi^osite tlio foiu-th 



row of elytr'al piinctures. Prosternxun not margined, coarsely 

 punctured obliqtms, Fabr. 



3 (2) Base of thorax with a longitudinal impression, boixnded outwardly by 



a distinct ridge, opposite the foui'th row of elytial punctures. 

 Prosternum margined, finely punctured. 

 . 4 (5) Pale yellow, black lines on elytra obsolete on the basal fourth. 

 Thorax little more than two and a-half times as broad as long, less 

 contracted in front pallens. Fowler. 



5 (4) Usually red-yellow, black lines on the elj'tra complete to the base. 



Thorax at least three times as broad as long, more strongly narrowed 

 in front confinis, Steph. 



6 (1) Elji:ra with regular rows of deep puuctiu-es. 



7 (16) Base of thorax without a longitudinal impression on each side 



opposite the fourth row of elytral punctiu-es. 



8 (15) A row of large punctures across the base of the thorax. 



9 (12) Elytra without dark markings. Front edge of thorax not roundly 



produced in the middle. 



10 (11) Head large, more than half as wide as the base of the thorax. Body 



subelliptic with parallel sides. Front edge of thorax biconcave, 

 produced into a slight angle in the middle nnicronatus, Steph. 



11 (10) Head moderate, less than half as wide as the base of the thorax. 



Body widest before middle of elytra. Front edge of thorax not 

 prodiiced in the middle Jlavicullis, Stiu-m. 



12 (9) Elytra with dark spots. Front edge of thorax sinuate, slightly 



roundly produced in the middle. 



13 (14) Elytra with the sixttu-e and a variable niunber of oblong spots which 



are situate on the interstices and do not, any of them, touch the 

 suture, blackish. Sides of thorax straight .fulvus, Fabr. 



14 (13) Elyti-a with the svitm-e and a variable mmiber of irregidar spots 



whicli are not markedly oblong, and some of \\liich touch the 

 suture, blackish. Sides of thorax distinctly convex... 



i'« rierja t its, Stiu'm. 



15 (8) Punctures on the base of the thorax but little larger than those 



across the apex. Sides of thorax straiglit and fomiing a distinct 

 angle with the outline of the elytra. The latter with more or less 



interrupted dark lines laminatus, Schall. 



A 2 



