ENTOMOLOGICAL NEWS 



AND 



PROCEEDINGS OF THE ENTOMOLOGICAL SECTION 



ACADEMY OF NATURAL SCIENCES, PHILADELPHIA. 



Vol. XVII. APRIL, 1906. No. 4. 



CONTENTS: 



Blaisdell— Notes and descriptions of Britton — Some new or little known 



the larva of Culex varipalpus Coq. 107 Aleyrodidae from Connecticut— II 127 



Caquillett— A new Culex near curriei. 109 Slingerland— Formaldehyde as an in- 



Skinner— On Dr. Dyar's Review of the secticide 130 



Hesperidae no Williamson— Dragonfiies (O don at a)' 



Riley— A Malpighian tube within the collected by Dr. D. A. Atkinson in 



heart 113 Newfoundland, with notes on some 



Houghton — Notes on Caenocara ocu- species of Somatochlora 133 



lata Say 114 Johnson — An emergency case in insect 



McClendon— Notes on the true Neurop- architecture 139 



tera 1 16 Itditorial 140 



Howard— An interesting new genus Doings of Societies 141 



and species of Encyrtidae 121 



Aldrich— The Dipterous genus Calo- 



tarsa, with one new species 123 



Notes and Description of the Larva of Culex varipal- 

 pus Coq. 



By F. E. Blaisdell. 



(Plate III) 



At the 14th meeting; of the Pacific Coast Entomological So- 

 ciety (Ent. News, Vol. XVI, No. 3, p. 96, I reported the 

 rinding of an interesting Culex larva in Contra Costa Co., 

 Calif. Imagines subsequently bred from the larva were sub- 

 mitted to Prof. Coquillett, who pronounced the species Culex 

 varipalpus. 



The larvae are remarkable for their elongate form, large 

 anal branchiae and sluggish, awkward movements. All of the 

 larvae of this species that I have seen were taken from a hole 

 in a sycamore tree ; for the last three years they have been 

 abundant, from July to January, when there was sufficient 

 rain to keep water in the hole. 



The largest larvae (Fig. 1 of Plate) are 7 to 8 mm. in 

 length, including the siphon, and nearly six times longer than 

 the width of the prothorax. Color is yellowish to a dirty 



107 



