144 Journal New York Entomological Society. tv°'- ^^• 



tion, made in Italy in 1900. It was made by Drs. Sambon and Low 

 during their world-famed malaria experiment in the Roman Cam- 

 pagna. They naturally gave considerable attention to the habits of 

 Anopheles and in the final account of their experiment we find the 

 following: "The fully developed Anopheles claviger was found in 

 great numbers in the houses, stables and henhouses, frequently rest- 

 ing on cobwebs."* 



Species of at least three other families of Nemocera frequent 

 spider webs. During my trip to Central America, in 1905, I found a 

 species of Cecidoniyidse which was perfectly at home on a spider 

 web. At Port Limon, Costa Rica, on the edge of the jungle, I ex- 

 amined a water-barrel for mosquito larvae. A spider had spun its 

 web over a large part of the open head of the barrel and clinging 

 to the under side of the web were a number of Cecidomyidse. They 

 were all the one species and evidently at home on the web, for, upon 

 being disturbed, they took flight but soon returned to the web. A 

 number of them were captured, and it was found that both sexes 

 were present. The species has remained undetermined until, a short 

 time ago, I submitted the specimens to Dr. Felt. He has been kind 

 enough to study them and informs me that they are an undescribed 

 species which he has referred to the genus Coquillettomyia.' 



The following summer, much to my surprise, I found a cecido- 

 myid with identical habits in the vicinity of Washington. The first 

 specimens were found on webs on the window of a cabin in the 

 woods. They were there in some numbers and behaved in the same 

 manner as those I had taken in Costa Rica. Afterwards I found 

 them repeatedly, I might almost say unfailingly, on the cloth-like 

 webs of certain spiders (probably Amanrobins). They were pres- 

 ent in considerable numbers, clinging to the under side of a large web, 

 in the hollow of a tree. In the woods I have found them also on 

 webs not particularly sheltered from above, although in such situa- 

 tions they appear to be more rare. As in the Costa Rican case both 

 sexes occur on the webs. I have also submitted specimens of these 

 insects to Dr. Felt and he has kindly examined them. He refers 

 them to the genus Ciinodiplosis and informs me that they are prob- 

 ably an undescribed species. He has further informed me that in 



^ Brit. Med. Journ., Vol. 2 for 1900, p. 1682. 

 "Described by Dr. Felt in this number on p. 154. 



