86 ENTOMOLOGICAL NEWS. [Feb., '16 



but in feet. The female of Anax strennus was described by Hagen 

 from a specimen taken on the island of Oahu and preserved at the 

 Copenhagen Museum. 



My Anax strenuus is still in perfect condition. My Rhinopsis canicu- 

 lata, I trust, is equally so. My Ululodes, alas! is possessed of only a 

 thorax, four perfect wings and one antenna. Accidents always hap- 

 pen to uniques, and there was more truth than poetry in the student's 

 answer to the question, how many legs has an insect? Some have 

 three, some five, some two, but none ever have six. O. S. WESTCOTT, 

 Oak Park, Illinois. 



The Change of Color in the Winter Eggs of Myzus rosarum and 

 Macrosiphum rosae (Hem. Horn.). 



There is a city park near the Entomological Laboratory of the State 

 College of Forestry. Here the writer found this fall two species of 

 rose aphis, Myzus rosarum and Macrosiphum rosac, on Rosa rugosa. 

 They were abundant November ist. November 4th the winged females 

 were first observed ovipositing. The eggs on deposition were a vivid 

 emerald green, some of which by November 5th had turned to the 

 characteristic black of winter aphid eggs. On the stems at this date 

 were taken all intermediate colors, varying from a bright green, a 

 greenish-tan, deep olive-brown to a black. 



It was observed that fresh aphid eggs from these species remained 

 of a greenish hue much longer in the warm laboratory than out of 

 doors. It would be interesting to definitely determine whether the 

 change from green to black is essential; whether or no the change to 

 black keeps the eggs during the winter months at a higher temperature 

 than the temperature of the surrounding medium. A number of fac- 

 tors might be responsible for this color change, such as light, tem- 

 perature, the presence of an enzyme in the egg. W. O. ELLIS, Ento- 

 mological Laboratory, State College of Forestry, ^Syracuse, N. Y. 



Entomological Literature. 



COMPILED BY E. T. CRESSON, JR., AND J. A. G. REHN. 



Under the above head it is intended to note papers received at the 

 Academy of Natural Sciences, of Philadelphia, pertaining to the En- 

 tomology of the Americas (North and South), including Arachnida and 

 Myriopoda. Articles irrelevant to American entomology will not be noted; 

 but contributions to anatomy, physiology and embryology of insects, how- 

 ever, whether relating to American or exotic species, will be recorded 

 The numbers in Heavy- Faced Type refer to the journals, as numbered in 

 the following- list, in which the papers are published. 



All continued papers, with few exceptions, are recorded only at their 

 first installments. 



The records of systematic papers are all grouped at the end of each 

 Order of which they treat, and are separated from the rest by a dash. 



Unless mentioned in the title, the number of new species or forms are 

 given at end of title, within brackets. 



For records of Economic Literature, see the Experiment Station Record 

 Office of Experiment Stations, Washington. Also Review of Applied En- 

 tomology, Series A, London. 



For records of papers on Medical Entomology, see Review of Applied 

 Entomology, Series B. 



1 Proceedings, The Academy of Natural Sciences of Philadel- 

 phia. 4 The Canadian Entomologist. 8 The Entomologist's 

 Monthly Magazine, London. 10 Nature, London. 11 Annals 

 and Magazine of Natural History, London. 14 Proceedings of 



