208 JOURNAL OF ENTOMOLOGY AND ZOOLOGY 



resemble this species. The host plant of P. quercus is given as 

 the canyon live oak, Quercus chrysolepis, and if these are of this 

 species then it is worthy of note that Platanus racemosa as well 

 as Quercus clirysolepis, is a host. 



MOSQUITOS AND COBWEBS 

 James Zetek, Ancon, C. Z. 



During February and Marcli, 1913, extensive breeding in a 

 salt-water marsh along the old French canal caused a heavy 

 influx of adults of Anopheles tarsimaculata Goeldi and Aedes 

 taemiorliynclius Wiede., at Gatun, Canal Zone, about 4,000 feet 

 distant. A cement shed and a store house, only 600 feet to the 

 south-west from tlie breeding place contained many cobwebs, 

 and these were so weighted down with mosquitos of the species 

 mentioned, that in several cases the webs showed breaks. It is 

 no exaggeration to say the cobwebs were black with these 

 mosquitos. 



Another instance of mosquitos in cobwebs was seen June, 1913, 

 in native shacks near Culebra, C. Z. In these there were on an 

 average of six mosquitos to a web, principally Ciilex quinque- 

 fasciaUis Say and Aedes calopus Meigen. Two specimens of 

 Mansonia titUlans Walker, three of Aedeomyia squamipenHis 

 Arib. and three of Lutzia higotii Bellardi were also noted in 

 these webs. 



The last instance was noted in October, 1913, at Paraiso, C. Z., 

 while with Doctor Martini and Mr. Pickett. In a single shack, 

 adults of Culex cpdn quefascintus Say were present in cobwebs. 

 It did not appear that the spiders cared much for such food, 

 probably because larger diptera were plentiful and to be had 

 easily. It seems mosquitos are accidentally entrapi^ed in these 

 webs while seeking shelter in corners of buildings. 



