137 



ANOTHER STRAWBERRY SAW-FLY.* 



Monoslegia ignota (Nor.).t 

 By F. W. Malley, Cbaiupaigu, Ills. 



Fig. 22.— Monostegia ignota : a, egg ; b, blisters containing eggs ; c, blisters from which larv£6 have 

 issued- d, d, young larva? ; /, full grown larva ; g, cocoon containing larva (natural size); h, shows gr 

 enlarged ; i, adult female , jj, ventral and lateral view of abdomen of female ; k. saw ; I, labium and 

 labial palpi ; ?/i. maxillse and maxillary palpi; )i, mandibles; o, ventral view of embryo after segmen- 

 tation ; p, embryo, lateral vi 'W, ventral surface outermost: q, embryo, lateral view, ventral surface 

 curving inward; r, embryo, lateral view, ventral surface doubled upon itself, and showing beginnings 

 of alimentary canal ; s, embryo, showing alimentary canal completed, eyespots, muscles of mouth- 

 parts, &.c. (Drawn by the author.) 



The adults of this species are bhick four- winged saw flies {Tenthredin- 

 idee), about .28 inch long. By displacing the wings, characteristic 

 dull whitish spots are seen on the back of the abdomen. However, the 



*This article is a brief extract, giving the more important results of the study of the 

 above named species, and included in a Thesis prepared for the degree of Master of 

 Science at the Iowa Agricultural College, Ames, Iowa. 



\ Selandria ignota (Nor.). Trans Am. Eat. Soc, I, page 257. 



Monostegia ignota (Nor.). Cressou's Synopsis N. Am. Hymen., page 162. 



