Dec, 1919.] Shaeffer: Notes on Chrysomelid e. 333 



It is a large insect, similar in form to Homopluvta abdominalis but 

 a little more robust and entirely blue above. It belongs in the Galeru- 

 cini and is placed in European catalogues in the neighborhood of 

 Ex soma. 



CEdionychis nigrosignata new species. 



Form of scalaris Melsh. ; flavous, shining; elytra with a common sutural 

 spot about basal fourth and six spots on each elytron black, one on the humeral 

 umbone, two at side margin, one about basal fifth and one slightly below mid- 

 dle, the other three are situated on the disk of which the one a little below 

 middle is the largest, the upper one at about basal fourth and the apical spot 

 at about apical fourth. Head impressed between the antennae and more or 

 less distinctly punctate, above smooth. Prothorax impunctate and shining. 

 Elytra very minutely punctate and shining. Abdomen distinctly but rather 

 sparsely punctate. Length 5 mm. 



Brownsville, Texas. 



This is undoubtedy the same as the Texas specimen mentioned by 

 Dr. Horn in Trans. Am. Ent. Soc, vol. XVI, p. 195, in the remarks 

 following the description of scalaris. It is relatively a little narrower 

 than scalaris, the upper surface very shining and the elytra minutely 

 punctate. The antennae are pale with the eighth and ninth joints 

 infuscate. The black common sutural spot is variable in size and 

 often absent, the upper submarginal spot is also absent in one or two 

 specimens. The umbonal sulcus, prominent in scalaris, is in nigro- 

 signata very feeble. The punctuation of the head is variable, in those 

 with the interocular impression more feeble the few punctures are 

 much smaller than in those with a broad median impression. The var. 

 b. of the Mexican (Ed. signata Jac. seems to be the only species from 

 that region with which nigrosignata can be compared. However, the 

 position of the four anterior spots in the former species is different 

 and there is apparently no common sutural spot. 



Disonycha quinquevittata Say. 



As defined by Dr. Horn this species is certainly an assemblage of 

 very heterogeneous forms. Some of these have undoubtedly a name 

 and are entitled to at least varietal standing but the descriptions are 

 poor and it is necessary to make comparison with the types. 



