262 Journal New York Entomological Society. [Voi xviii. 



Piiblilia concava Say var. nigridorsiim Godg., but P. reticulata V.''' D. 

 is not among them although it is also, in all probability, merely a 

 variety of Entylia. 



As shown in the Figs. 1-12 on plate VII the variations represent 

 a graded series from Pitblilia Stal to Entylia concisa Walk, with the 

 most gradual transitional forms. These forms represent more or 

 less completely the various " specific " forms. Besides the forms 

 represented in the figures I found a single male in which the anterior 

 thoracic prominence is completely lacking, but as this insect seems 

 to be malformed I have not drawn it and have represented only the 

 forms which occur most abundantly in the series. Owing to the 

 large number of specimens it is impossible to describe all the dif- 

 ferent variations, especially as all conceivable shades of the ground 

 coloration and pattern occur. Occasionally, however, a single speci- 

 men is unique in the series by reason of its striking individual 

 pattern. On the other hand, there are groups of specimens each pre- 

 senting a single type but varying, especially in the ground color, 

 within rather narrow limits. Thus, e. g., there are Entylia-Puhlilia- 

 forms which have a gray or brown color mottled more or less with 

 yellow, white, dark brown or black. Among the E. siiuiata-iovms 

 there are, with sporadic exceptions, variations of the various yellow, 

 brown, reddish brown and black ground colors, with yellow, light and 

 dark brown, black and white markings. 



That the insect also occurs on other plants besides Enpatorium 

 purpureuni is shown by the following data : Prof. Wheeler collected 

 on July 7, 1908, at South Harpswell, Me., 20 females and one male 

 of the Entylia-Pnhlilia-iorm, together with 'numerous eggs on Soli- 

 dago. Mr. William Reiff took numerous specimens of the same form 

 together with many nymphs on September 7, 1909, at Forest Hills, 

 Mass., on the same plant. Prof. Otto Lugger, in the " Sixth Annual 

 Report of the Entomologist of the State Experiment Station of the 

 University of Minnesota" (1900) says that Entylia sinuata occurs 

 " on a variety of plants and it is somewhat partial to sun-flowers." 



The nymphs of the series collected by Prof. Wheeler, in com- 

 parison with those taken last year by Mr. Reiff, have a somewhat more 

 prominent thorax; in other respects they are identical. Color varia- 

 tions were found only in the fully grown nymphs,- and these varia- 

 tions, of course, foreshadow those of the adult insect. The text- 

 figure I represents a full-grown nymph. 



