MOSOUITO FAUNA OF PANAMA BUSCK 



6i 



It is identical in life-mocle with the West Indian form and is found 

 onlv near the crab-holes in which the larvae live. During the day 

 the adults remain within the holes. They come out in a swarm, if a 

 stick is inserted into the hole, but return quickly to their hiding place 

 when left alone. At dusk they come out and swarm above the hole 

 for copulation. Though a few specimens alighted on my hand, 

 which was held close to the hole, when I disturbed the mosquitoes, 

 none attempted to bite, and I do not believe this species ever molests 

 man. This is abundantly corroborated by earlier observations on 

 Dcinoccrifcs cancer by Mr. Knab and the writer in Central America 

 and the ^^'est Indies, against the observation of Dr. Grabham in 

 Jamaica that "it is a voracious bloodsucker." 



There are even good grounds for believing that none of the other 

 crab-hole mosquitoes associated with this species bite man. This 

 could be very easily determined by further observations on the spot, 

 and if they should be found to be harmless, it would save considerable 

 labor and expense at present spent by the Sanitary Department in 

 oiling these crab-holes. 



The species was bred and collected from crab-holes at La Boca and 

 back of the wireless telegraph station at Colon. 



The mosquitoes found associated with this species in the crab- 

 holes, and whose proclivity for biting should be tested, are Diiiomi- 

 iiictcs cpitcdciis and CuJcx cxtricator. 



Genus URANOT^NIA Arribalzaga 

 URANOT^NIA GEOMETRICA Theobald 



Bred from larvre in the pool of a clear, cold mountain brook back 

 of the Culebra cut, near Empire. The larva looks curiously like an 

 Anopheles larva, but furnished with a long tube. I bred this species 

 also from a slow-running stream near Gatun and from a swamp 

 near Culebra. Mr. A. H. Jennings bred it from streams near Gatun 

 and on Taboga Island. 



In the U. S. National ^Museum there is also a single specimen of 

 this species from Panama received from Dr. A. J. Kendall. 



URANOT^NIA CALOSOMATA Dyar and Knab 



This pretty little species is one of the smallest mosquitoes found in 

 the Canal Zone ; it is easily recognized by its size and b\' the silvery 

 lateral line and the silvery edging around the eyes on the otherwise 

 dark body. It was bred from deep hoof-prints in a swampy meadow^ 

 near Tabernilla. The larvae are verv elongate, with reddish bodv, 



