74 Journal New York Entomological Society. [Vol. xiv 



Of especial interest are the author's observations on the early stages 

 of two species of the genus Tceniorhynchus , T. fasciolatus and T. arri- 

 balzagce. The first information relating to the early stages of this 

 genus was given by Dr. Goeldi in a footnote on p. 27 of his first 

 bulletin on the mosquitoes of Para, published in 1902, and notes 

 furnished by him were incorporated in Theobald's Monograph, v. 3, 

 1903, p. 257 and 269. These observations are based upon T.fas- 

 ciolatus but answer as well for the other species, as no essential differ- 

 ences were noted between the two. It is decidedly a forest mosquito, 

 and only enters houses occasionally in the evening. It shows itself 

 sensitive to confinement and does not survive it long. Of 170 cap- 

 tured females fed with blood only 25 laid eggs. The eggs are laid 

 in a double-rowed chain, fastened together like those of Culex pipiens. 

 The chain is rather strongly convex upon the lower side, and rests upon 

 the water after the manner of the egg-raft of Culex pipiens. It is only 

 after the larvae have been hatched that it falls upon its side and dis- 

 integrates. The number of eggs in a chain was from 60 to 63 and the 

 female dies very soon after the act of oviposition. The eggs hatch in 

 about four and one half days. The author compares the shape of the 

 eggs to that of a champagne bottle but the accompanying figures do not 

 show the pronounced neck that this description implies. The surface 

 of the egg is covered with coarse conical papillae. The young larva? 

 are of very remarkable appearance well shown in two photognq)hic 

 figures. The antennae are very large and of peculiar shape but are 

 not two-jointed as the author indicates in the drawing of fig. 76. 

 The mouth tufts are large, the tracheal tubes very slender. Most 

 remarkable is the form of the breathing tube, the basal portion very 

 broad and rounded off, narrowed beyond the middle to a very slender 

 tube terminated by a whorl of spines. The slender terminal portion 

 somewhat exceeds in length the broad basal part and the general aspect 

 reminds one of a peaked helmet. All attempts to rear these larvae 

 failed and they died after a few days. These larvae agree quite closely 

 in general appearance with the young larvae of Taniorhynchus pertur- 

 batis, described and figured by Dyar and Currie in Proc. Ent. Soc. of 

 Washington, v. 6, 1904, p. 218-220. In this last-mentioned species, 

 however, the eggs, about 150, are laid in a raft. No clue has yet 

 been given to the natural habitat or food of these strange larvae and it 

 is to be hoped that Dr. Goeldi, in such favorable surroundings, will 

 succeed in solving the mystery of these strange larvae. 



