KEVISION" OF GENUS TACHYPORUS — BLACKWELDER 53 



Kentucky, Michigan, Wisconsin, Nebraska, Iowa, Kansas, Texas, 

 New Mexico, Wyoming, Washington, Ontario. 



Remarks. — The species named maculicollis by LeConte seems to 

 have been valid and not a variety of chrysomelinus as thought by 

 Horn. It was previously described by Say as acaudus. Both names 

 appear to be available, so the earlier one must be used. 



TACHYPORUS ARIZONICUS. new species 



Form robust and convex. Piceous; antennae, trophi, prothorax, 

 elj^tra, and legs testaceous; distal half of antennae fuscous; pro- 

 notum clouded at middle; elytral suture and margin indefinitely 

 darker. Antennal segments all longer than wide, terminal less than 

 one-half longer than tenth. Third segment of maxillary palpus 

 feebly dilated, fourth conical but acicular. Pronotum with sides 

 straight in apical half; not wider than elytra. Elytra exceedingly 

 finely and rather densely punctate; without sutural series of large 

 punctures ; marginal series of three punctures ; with additional discal 

 puncture near humerus. x4.bdomen above indistinctly punctured; 

 beneath a little more distinctly, and with numerous of the large 

 bluntly muricate punctures on the apical segments. Eighth tergite 

 of male narrowly rounded ; eighth sternite triangularly notched, the 

 notch two-thirds wider than deep, apex not rounded, angles obsolete. 

 Eighth tergite of female 4-lobed, the median pair a little longer 

 and separated to base; eighth sternite rounded and with a single 

 series of silken hairs. 



Type locality. — Chiricahua Mountains, Ariz. 



Type. — Holotype (a male from Chiricahua Mountains, Arizona, 

 11-6, collection of Hubbard and Schwarz) and 8 paratypes, 

 U.S.N.M. no. 50893; 12 paratypes in collection of the writer; para- 

 types from Arizona (Chiricahua Mountains, Santa Eita Mountains, 

 and Nogales). 



Remarks. — The coloration of this species is very similar to that 

 of several others. It is best separated by the elytral punctures. It 

 has not been seen from outside of Arizona. 



TACHYPORUS ALLENI, new species 



Form robust and convex. Piceous; trophi, prothorax, elytra, and 

 legs testaceous; pronotum clouded at center, elytra vaguely darker 

 about scutellum. Third segment of maxillary palpi moderately ex- 

 panded, fourth acicular. Pronotum with sides straight in apical 

 half; not wider than elytra. Elytra very finely, irregularly, and 

 somewhat indistinctly punctate, the punctures excavated behind; 

 without sutural series; lateral series of four punctures, and with an 

 additional discal puncture near the humerus. Abdomen above more 



