1288 CONTENTS 
PAGE 
Number, of generations, inva year {220 eee 1335 
RDO RNa tion «sche Ns Bee Se I eee ei a ns ol Nene 1336 
Discoloration “in jhibernatine adults) ee 1336 
Hirst appearance of thesadults inthe spring 2) EE 1337 
Factors reducing the number of individuals —__.......-.. 1337 
PATASItES |, sie ae Nk eS 1338 
Rigg. WATASIteS: 2.2 es ee Eee 1338 
larval: parasites: eS 1338 
Pupal parasites) 222) 2 ee 1338 
Parasites s Obst] adult ieee ee ees 1341 
Predacious enemies! 6 2:0.02 2 se 1341 
Factors affecting the spread of the species —... 1341 
Heonomic-importance ot the familly 222 ee ee ae ee 1342 
Description of the life stages of the species 2... 2 1343 
Chrysopa oculata. (Say vos. eae 2 ee a eee 1343 
Chrysopa nigricornis, Burm 2 2 ee ee eee 1347 
Chrysopa quadripunctata, Burm. 2 2 eee 1349 
Chrysopa chi: Witch ee ee oe 1352 
CRrYSODG TA LGO TSE UTI pe ee eee eee 1356 
CRILYSODGS DLOTADUNGa Hitch ee eee 1359 
GRLYSODG: (SPiN ON 1361 
Chrysopa tineaticonnis Witch: 2: ae 1361 
Chrysona bimacuiata McClend: 9223 eee 1364 
Chirysona. lateralis (Guerin 1365 
Chrysopa _cockerellt Banks: ee eee 1365 
Other trash “carriers! sos in SN sh 1367 
Biblio grap lay: (cc a ee SST os AW GE oc 1367 
