52 Maine Agricultural Experiment Station. 1917. 



furrows indistinct and often resembling rows of con- 

 fluent punctures. ribearia. 

 aa. Elevation along caudal margin of mesothoracic spiracle 

 strongly elevated and not visible in ventral view ; spir- 

 acular furrows narrow, but distinct, the edges sharp. 



anataria. 



DIASTICTIS RIBEARIA Fitch. 

 The Gooseberry Span-worm. Fig. 3, F, and Fig. 4, I and J. 



Color dark reddish brown; head, thorax and appendages 

 usually smooth and polished, occasionally with indeterminate 

 transverse striations, especially on the thorax; antennae with 

 transverse impressions indicating the segmentation, usually as 

 long as the wings but seldom meeting on the meson ; a distinct, 

 transverse furrow present between the invaginations for the 

 anterior arms of the tentorium ; eye-pieces almost equal in width ; 

 elevation caudad of the mesothoracic spiracle prominent, and 

 visible in ventral view, the surface thickly covered with fine 

 whitish setae ; spiracular furrows of the fifth abdominal segment 

 indistinct and resembling confluent punctures ; cremaster 1 mm. 

 in length, rugose and bifurcate for about one-fourth its length. 



Length 10 to 12 mm. ; greatest width 3.5 mm. 



The larvae feed on leaves of gooseberry, currant and blue- 

 berry. They are more often found on the gooseberry and often 

 become a serious pest. The larvae are whitish, irregularly 

 spotted with black and have yellow stripes on the dorsal and 

 lateral aspects. They are full-grown about the last of June 

 and enter the ground to pupate, but do not spin a cocoon. The 

 moths emerge from the pupae in two or three weeks and lay 

 their eggs which hatch the following spring. 



DIASTICTIS ANATARIA Swett. 

 Fig. 4. G and H. 



Color dark reddish brown, head, thorax and appendages 

 with fine indeterminate transverse striations, but giving a smooth 

 and polished appearance ; antennae as long as the wings and 

 meeting on the meson at their caudal margin ; a transverse fur- 

 row indicated between the invaginations for the anterior arms 



