Jan., 1908.] The Ohio Species of the Genus Disonyeha. 



427 



in form to xanthomelaena. Head 

 posteriorly, front yellow, a few deep 

 Thorax pale yellow. Prothorax yel- 

 , abdomen piceous at the middle with 

 yellowish. Femora entirely yellow; 

 ; tarsi piceous. Length 4.5-5. mm. 



and Colorado. Also reported 



J), mellicollis. Say. Oval, similar 

 blue-black between the eyes and 

 coarse punctures near each eye. 

 low beneath, metathorax piceous 

 apical segment and wide border 

 tibia piceous; paler at the base 



Occurs in Louisiana, Texas 



from Cincinnati, Ohio. 



D. coUata. Fab. Oval, slightly oblong, sub-depressed. Vertex and occi- 

 put black, front yellow, a few coarse punctures close to the eyes. 

 Thorax yellow, immaculate. Prothorax beneath yellow, metasternum 

 black. Abdomen piceous with the last segment and sides broadly 

 3'ellowish, densely punctured with a distinct pubescence. Femora 

 pale yellow, tibia at tips and tarsi piceous. Length 4.-4.5 mm. 



Occurs in Georgia and Florida. Reported from Cincinnati, 0. 



Life History Studies. 



While at the Ohio State University Lake Laboratory at 

 Sandusky the past summer, opportunity was afforded to do 

 some work on the life history of D. quinquevittata, the life cycle 

 of which species, as far as I am aware has never been studied. 



Fig. I. Disonyeha quinquevittata. Dorsal and ventral view of adultbeetle. 



The beetles and larvae in this region feed upon a small scrub 

 willow, Salix interior, which grows in rather isolated and well 

 defined patches on the sand plain on the lake side of Cedar Point, 

 and when I arrived at the Laboratory about the 25th of June, 

 the beetles were quite abundant, and some larvae were found 

 although not as many as later on. 



