464 AMERICAN PACHYBRACHYS (cOLEOPTERA) 



eastern species I have no great hesitation in using the name for 

 the present one. I do not know on whose authority the M-ni- 

 grum of Melsheimer is placed as a synonym of picturatus in the 

 Henshaw List, but there is absolutely nothing in the descriptions 

 to warrant such a course. 



This is one of our rarest species, and thus far only five specimens 

 have been seen by me. It is probably ciuite restricted in range. 



145. Pachybrachys viduatus Fabricius 



Size large, yellow, with sharply defined and rather broad black 

 frontal marks and thoracic M, elytra with sutural bead, median 

 vitta and narrower lateral vitta black, punctuation dense — espe- 

 cially in the female — and usually with but slight traces of striae; 

 eyes widely separated; front without ocular lines; front claws of 

 male not appreciably larger. Ave. length 4 mm. Gulf States. 



Head not at all wider than the thoracic apex, front quite densely subevenly 

 punctate; eyes separated by rather more than twice the length of the basal 

 antennal joint in the male, and by two and one-half or two and two-third 

 times the length of the basal joint in the female; terminal joint of maxillary 

 palpi nearly as pointed in the male as in the female. Antennae nearly as long 

 as the body in the male, yellow with the tip of the terminal joint dusky, more 

 rarely with basal and several of the outer joints blackish, tenth joint four times 

 as long as wide in the male, and nearly so in the female. 



Prothorax not very stronglj'- transverse, sides moderately rounded and con- 

 vergent in front, surface densely subevenly punctate, more sparsely so along 

 a narrow lateral margin, apical margin pale throughout; M broad, entire, 

 sharply defined, leaving three discal yellow spots, two basal and one anterior 

 median one connected with the front margin. 



Elytra rather variably but more or less densely confusedly punctate without 

 impressed striae, though with the punctures here and there showing serial 

 arrangement in longer or shorter lines; shield wanting; marginal interspace 

 punctured in the female, more sparsely so in the male; disk with two black 

 vittae attaining the declivity, the inner one wider, the outer one often inter- 

 rupted posteriorly leaving a detached spot. 



Pijgidium black with two large, often confluent, o\-al apical yellow spots. 

 Body beneath black, sides of last ventral segment yellow. Legs yellow, the 

 bases of the thighs and apices of the tibiae often clouded with browTiish shades; 

 apical spur of front tibiae very small. 



Length 3.5 to 4.5 mm.; width 1.85 to 2.35 mm. 



Distribution. — Georgia: (Liebeck Coll.). Florida: (Leng Coll.); Key West 

 (Leng). Alabama: Mobile and vicinity, June (Loding), (Soltau). Louisiana: 

 Covington, June (Leng Coll.), (Wenzel Coll.), July 2 (Soltau). Texas: Tyler, 

 July 7 (Soltau— Nat. Mus. Coll.). 



