Dec, 1919J Shaeffer: Notes on Chrysomelid^e. 335 



''A. crenicollis. — Yellowish; thorax five-spotted; elytra with black 

 vittae. Inhabits Mexico. 



" Body pale yellowish ; antennae blackish ; three basal joints honey- 

 yellow, with a black line above ; vertex with a black spot, thorax with 

 two small dots, and an abbreviated line arranged triangularly, black, 

 and a lateral, somewhat larger, oblique, oval indented black spot ; 

 scutel black; elytra impunctured, destitute of striae; a common sutural 

 black vitta, another in the middle, somewhat narrower than the inter- 

 vening portion, and a submarginal one ; pectus yellowish ; postpectus 

 and venter black, the latter with yellowish margins to the segments ; 

 feet honey-yellow ; tibiae and anterior and intermediate thighs with a 

 black line. Length % of an inch." 



According to the above description crenicollis has a five-spotted 

 prothorax, a median elytral vitta which is a little narrower than the 

 preceding yellow space ; the underside yellowish, except the meta- 

 sternum and abdomen, which are black, the abdominal segments with 

 yellow margin ; legs honey yellow, tibiae, anterior and intermediate 

 femora with a black line above. Dr. Horn's crenicollis has the median 

 elytral vitta as wide or wider than the yellow space on either side, the 

 abdomen yellowish or pale brown, the tibiae and tarsi piceous, and the 

 femora, especially the posterior one, more or less infumate and 

 darker. Dr. Horn also states that it occurs from Xew York to south- 

 western Texas and Mexico, but I am rather doubtful of the occurrence 

 of this species so far north. In the New Jersey list Prof. Smith 

 records it from Hudson Co., Delaware valley and the Pine barren as 

 not rare, but they are undoubtedly wrongly identified. A specimen 

 from New Jersey received from Mr. Chas. Liebeck as crenicollis and 

 others from various places in New Jersey, from Long Island and 

 Kansas differ too much from the Texas specimens to be considered 

 the same. These specimens are less elongate, the antennal joints de- 

 cidedly shorter and stouter and the prothorax and especially the elytra 

 generally distinctly punctate. They are very close to arizoncc, except 

 that the abdomen is more densely punctate and the femora are gener- 

 ally clouded. It is possible that these are punctigcra Lee. described 

 from Kansas which name was placed as synonym of quinqucvitta by 

 Dr. Horn. 



