DESCRIPTIONS OP NEW SPECIES. 233 



Asperities feeble, arranged in rows ; 



* Elytra flattened on the disk in front ; 



Elytra with a white fascia behind the middle, lateral tubercle of pro- 

 thorax very broadly rounded. PLANIDORSUS n. sp. 

 ** Elytra not flattened on the disk ; pubescence concealing the 



punctures ; 

 Elytra less prolonged behind, lateral tubercle of prothorax broadly 



rounded. BIUSTUS Lee. 



Elytra more prolonged behind, lateral tubercle of prothorax obtuse but 



not rounded. ALBIDDS Lee. 



Elytra less prolonged, lateral tubercle obtuse not rounded, (much 

 smaller). PARVUS n. sp. 



*** Elytra not flattened on the disk ; pubescence not concealing the 



punctures ; 



Elytra obliquely rounded, truncate at tip ; not fasciate with white ; 

 Punctures of elytra rather fine, lateral tubercle of prothorax rounded. 



COLLARIS Hold. 



Punctures of elytra very coarse ; 



Larger, lateral tubercle of prothorax obtuse, rounded. PERPLEXUS Hold. 

 Smaller, tubercle of prothorax obtuse, not rounded. COMMIXTDS Hold. 

 Elytra more broadly rounded, truncate at tip, prothorax with very obtuse 

 rounded lateral tubercle and black spots, and elytra with a paler band 

 behind the middle. MACULA Say. 



560. L,. Palmeri. Nigro-piceus, prothorace transverso, pube ochrea 

 variegato, parce grosse punctato, lateribus paulo dilatatis, haud tuber- 

 culatis, prope basin transversim constricto et angustato; elytris protho- 

 race plus sesqui latioribus, dorso antice planiusculis, parce grosse punc- 

 tatis, apice rotundatis, pube brevi ochrea dense vestitis, fascia basali, 

 macula lateral!, fascia postica, guttisque pluribus obscuris; antennia 

 cinereo-annulatis. Long. 18 25 mm. 



A female from Arizona, collected by Dr. Henry Palmer, kindly 

 given me by Mr. Ulke, in whose collection it bears the name 

 I have adopted ; a male sent by Mr. C. V. Riley to Dr. Horn. 

 Conspicuous by its large size ; besides the dark spots on the ely- 

 tra mentioned in the diagnosis, there is also one near the side, 

 about one-fourth from the apex, which is also dark ; the band is 

 sinuated, and runs slightly obliquely backwards from the suture. 

 The male is very remarkable for having the 6th joint of the 

 antennae dilated inwards at the tip. 



561. L. planidorsiis. Subtiliter dense griseo-pubescens, prothorace 

 dorso subtuberculato, tuberculo laterali obtuso haud rotundato, apice et 

 basi parce punctato ; elytris dorso antice deplanatis, carina laterali dis- 



16 June, 1873. 



