Mar., '04] ENTOMOLOGICAL NEWS. 83 



of C. fatigans, reminding one strongly of the anal filaments of 

 Psorophora ciliata. Dr. Howard remarks that the anal fila- 

 ments " may possibly function as gills while the larvae are very 

 young." In the anal filaments of a young larva of G. jamai- 

 censis, the tracheae are very large and as well developed as in 

 other parts of the body. The two main body tracheae extend 

 on beyond the respiratory tube throughout the length of the 

 last abdominal segment. Each of these bifurcates and sends 

 a branch to each of two anal filaments. The filaments seem 

 to be set in pairs corresponding to the bifurcated tracheae. 

 The last abdominal segment with its two main tracheae and 

 with one anal filament is shown at b, Figure I. 



The respiratory tube of the larva is much longer than that 

 of C. fatigans or C. pungens. 



The pupa also is much larger than the pupa of C. pungens. 

 By observing a large number of pupae, I found that in mid- 

 summer, the pupal stage lasts almost exactly forty-eight hours. 



Mr. Theobald states that the eggs, as noted by Dr. Grabham, 

 are laid singly. Although careful search for the eggs was re- 

 peatedly made they could not be found. The larvae would 

 invariabty appear in a pool within twelve hours after the for- 

 mation of the pool by a rain storm. The conviction was grad- 

 dually forced upon me that the eggs were deposited in or upon 

 the mud to await the coming of the rain. Such a habit of 

 egg deposition for this species is a matter of circumstantial 

 evidence only, for absolute proofs of it are wanting. Since 

 making the observations on this species, Dr. J. B. Smith has 

 published the results of his experiments with Culex sollidtans. 

 In these experiments, Dr. Smith proved, conclusively, that 

 C. sollidtans deposits its " eggs singly, in dry mud or moist 

 soil, and that for months they lie thus, ready to hatch when 

 covered by water of a proper temperature." Since the publi- 

 cation of the third volume of Theobald's " Monograph," we 

 find that he has removed C. sollidtans to the genus Grabhamia, 

 thus showing the close relation of the two species under dis- 

 cussion. Therefore it will not be surprising if the habit of egg 

 deposition of G. janiaicensis is similar to that of C. sollidtans. 



The adult female is a striking mosquito, with heavily scaled 



