316 ENTOMOLOGICAL SOCIETY 



insects was relatively rather less than in its gigantic relative. 

 IMo maggots of Sarcophaga and no intruders of any kind were 

 found in these tiny pitchers. 



In discussing this paper Mr. Ashmead stated that in Jacksonville, 

 Florida, he had studied the insects found in the pitchers of several 

 species of the pitcher-plant and could corroborate Mr. Hubbard's 

 statement of the enormous number of insects which were found in 

 such locations. He himself had found some rare Coleoptera in 

 this way. He had never heard, however, of species of Sphex in 

 such situations, and doubted Mr. Hubbard's theory that this insect 

 feeds upon the lepidopterous larvae in the pitchers, since Sphex 

 is almost invariably a storer of orthopterous insects. The genus 

 Isodontia has recently been suppressed ; but if Mr. Hubbard's ob 

 servation that this insect feeds upon lepidopterous larvae is cor 

 rect, this difference in habit from the ordinary Sphex may war 

 rant the revival of the genus. Mr. Hubbard, however, stated 

 that he did not observe the food of Sphex and it was a mere 

 supposition that it fed upon Lepidoptera. Grasshoppers were 

 very plenty in the pitchers. Mr. Mann said that, following the 

 general rule, caterpillars of such bright colors as those found in 

 the pitcher-plant were apt to be distasteful to other insects. 



Mr. Howard read a paper entitled "Notes on the Life-history 

 of Culex pungens, with remarks about other Mosquitoes." * 



In discussion Dr. Gill said that he wished that some one 

 would make an effort to determine the species of other common 

 dipterous genera, and referred to the fact that he had caught upon 

 sticky fly-paper in his office room about a dozen different species 

 of Diptera and that Mr. Schwarz had told him that very few of 

 them could be determined offhand. Referring to mosquitoes as 

 fish food, he stated that a very large proportion of the food of 

 newly hatched fresh- water fish consisted of mosquito larvae. The 

 Trinidad fish referred to by the speaker probably belongs to 

 Rivulus or to Poecilia. Mr. Hubbard stated that he had noticed 

 that adult mosquitoes take some time in issuing from the pupa 



* Published in Bulletin 4, New Series, Division of Entomology, U. S. 

 Dept. Agriculture. 



