344 AMERICAN PACHYBRACHYS (cOLEOPTERA) 



24. Pachybrachys convictus new species 



Rufo-testaceous, finely alutaceous, lustre dull; prothorax with 

 small pale brown spots representing the basal parts of the stand- 

 ard M; elytra immaculate, more rarely with the standard spots 

 more or less developed; ocular lines present but not very con- 

 spicuous and quite close to the eyes; front claws of male much 

 enlarged. Ave. length 3.25 mm. California. 



Head moderately punctate; eyes not prominent, separated in the male by 

 one and one-half times the length of the basal antennal joint, or by a distance a 

 trifle greater than the length of the first two joints; in the female by barely 

 twice the length of the basal joint. Antennae passing the middle of the elytra 

 in the male and attaining the basal third in the female. 



Prothorax moderately transverse, sides quite strongly rounded behind the 

 middle, punctuation moderately strong and close, leaving scattered small 

 smooth areas which are a little more elevated. 



Ehjtral striae more or less impressed in the male, irregular but fairly contin- 

 uous except in the baso-sutural triangle, the fifth and sixth striae much broken 

 or confused at middle. In the female the punctuation is more confused, with 

 three more or less clearly defined intervals, the marginal interval more numer- 

 ously punctate and the submarginal stria more confused than in the inale, as 

 is frequently the case in other species; shield small but evident. 



Body beneath blackish in great part; legs pale, the femora scarcely or feebly 

 clouded at middle. 



Length 3.1 to 3.4 mm.; width 1.6 to 1.75 mm. 



Distribution.— California: Folsom, Aug. 7 (Nat. Mus. Coll.) type; Sacra- 

 mento Co., July. Several specimens collected by Coquillett in Los Angeles 

 Co. are a little smaller (2.8 to 3 mm.) with darker punctures; these look a 

 little different from the typical form, but a search for characters fails to reveal 

 a sufficient basis for a distinctive name. 



25. Pachybrachys arizonensis Bowditch 



Cylindrical, light yellow or pale rufo-testaceous, pale brown 

 punctate, minutely alutaceous and feebly or not shining, pro- 

 thorax with faint diffuse rufous clouds; ocular lines distinct, 

 finely impressed; front claws of male obviously enlarged. Ave. 

 length 3.4 mm. Kansas and Texas to California. 



Head moderal(>ly thickly punctate, except within the ocular emarginations, 

 with the usual rufous or brownish markings. Eyes scarcely prominent, sepa- 

 rated by the length of the basal two joints of the antennae or slightly more in 

 the male, and by about two and one-half times the length of the basal joint in 

 the female. Antennae very slender, attaining the posterior third of the elytra 

 in the male and the hind coxae in the female, pale yellow, dusky at tip. 



Prothorax moderately transverse, rather small in the female, sides arcuately 

 subparallel basally and narrowed in front in the male, slightly convergent 



