70 MAINE AGRICULTURAL EXPERIMENT STATION. 1917. 



The species of Schizura may be separated by the following 

 table : ^ 



a. Maxillae always more than seven-eighths the length of the 

 wings ; cephalic end of body blunt and only slightly pro- 

 jecting between the antennae ; abdominal segments 5 to 

 7 with the punctures distinctly larger and more numer- 

 ous along the cephalic margin ; body never with prominent 

 tubercle scars on the dorsum of the mesothorax, meta- 

 thorax, and first abdominal segments. ipomeae. 



aa. Maxillae five-sixths the length of the wings ; cephalic 

 end of body with a prominent, slightly bifurcate pro- 

 jection ; abdominal segments 5 to 7 with the punctures 

 of approximately the same size and not much more nu- 

 merous along the cephalic margin ; body with prominent 

 tubercle scars on the dorsum of the mesothorax, meta- 

 thorax and first abdominal segment. concinna. 



SCHIZURA IPOMEAE Doubleday. 

 Fig. 5, B. 



Color bright yellowish brown; body with a slight projec- 

 tion at the cephalic end between the proximal ends of the anten- 

 nae; epicranial suture visible for a short distance adjacent to 

 each antenna in the majority of specimens; face-parts and ap- 

 pendages smooth and polished, with very few punctures or oth- 

 er surface markings; mandibular area slightly elevated; anten- 

 nae ending just caudad of the mesothoracic legs, but never meet- 

 ing on the meson; maxillae more than seven-eighths the length 

 of the wings, the caudo-lateral angles always extending to the 

 eye-pieces ; sculptured eye-piece distinguished by its impressed 

 lines and slightly wider than the other; thoracic segments with 

 a few fine punctures ; mesothorax without punctures as in S. 

 concinna, but with short, transverse, impressed lines on each 

 side the meson; caudal margin of mesonotuin with seven pits 

 and six square black polished areas between ; abdominal seg- 

 ments sparsely covered with very fine punctures except for a 

 band along the cephalic margin of segments 5 to 7, which is 

 densely and rather coarsely punctate; first abdominal segment 

 often with a small rounded tubercle, or at least a tubercle- scar 

 on the meson showing the location of the prominent larval pro- 



