

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 



the larva of Culex varipalpus Coq. 107 

 Coquillett A new Culr\ inai rmriei. 



Britton Some new or little known 

 Aleyrodida- from Comiei ticut II 

 Slingerland Formaldehyde as an in- 



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



Hesperidte no Williamson Dragonflies (Odonatai 



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



heart 113 Newfoundland, with notes on some 



Houghton Notes on C:vnoi:ara ocu- species of Somatochlora 



lata Sav 114 Johnson An emergency case in insect 



McClendon Notes on the true Neurop- 



tera 1 16 



Howard An interesting new genus 

 and species of Encyrtidie 121 



Aldrich The Dipterous genus Calo- 



tarsa, with one new species 123 



architecture 139 



Editorial 140 



Doings of Societies 141 



Notes and Description of the Larva of Culex varipal- 



pus Coq. 

 BY F. E. BLAISDELL. 



(Plate III) 



At the 1 4th meeting of the Pacific Coast Entomological So- 

 ciety (ENT. NEWS, Vol. XVI, No. 3, p. 96, I reported the 

 finding of an interesting Gii/ex larva in Contra Costa Co., 

 Calif. Imagines subsequently bred from the larva were sub- 

 mitted to Prof. Coquillett, who pronounced the species Culc.v 

 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. i of Plate) are 7 to 8 mm. in 

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

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



107 



