THE STATE ENTOMOLOGIST. 



61 



INSECTS INJURIOUS TO THE GE APE VINE. 



The following articles under this head are a continuation of the 

 series began in my first and continued in my second Report, and I 

 shall continue the series until all the insects of any note, which affect 

 the Grape-vine, shall be treated of. 



THE GRAPE LEAF-FOLDER— Dcsmia maculalis, Westw. 



(Lepidopteia, Asopidre.) 



[Fig. 24.] 



The subject of this sketch has long been known to depredate on 

 the leaves of the Grape-vine in many widely separated parts of North 

 America. It is not uncommon in Canada West, and is found in the 

 extreme southern parts of Georgia. It appears to be far more inju- 

 rious, however, in the intermediate country, or between latitude 35 a 

 and 40°, than in any other sections, and in Southern Illinois and Cen- 

 tral Missouri proves more or less injurious every year. It was first 

 described and named by Westwood,* who erected, for it, the genus 

 Desmia. 



The genus is characterized by the elbowed or knotted appear- 

 ance of the c? antennas, in contrast with the smooth, thread-like ? 

 antennae; the maxillary palpi are not visible, while the compressed 

 and feathery labial palpi are recurved against the eyes, and reach 

 almost to their summit; the body extends beyond the hind wings. 



The moth of the Grape Leaf-folder is a very pretty little things 

 expanding on an average almost an inch, with a length of body of 

 about one-third of an inch. It is conspicuously marked, and the 

 sexes differ sufficiently to have given rise to two names, the female 

 having been named Botys bicolor. The color is black with an opal- 

 escent reflection, and the under surface differs only from the upper 

 in being less bright ; all the wings are bordered with white. The 



* Mag. Zool., par M. Guerin, 1S31 ; pi. 2. 



f Mr. Glover, in the Agricultural Report for 1854, p. 79, says that the male has a seini-lnnar 

 mark of white on the outside of each spot, which in his figure, pi. 6, ibid., is very distinct. In 

 dozens of specimens bred in Illinois and Missouri no such mark appears, though there is an appa- 

 rent coincident shade, barely distinguished from the black ground-color, on the outside of each spot 

 in both male and female. 



