yd SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 52 



harbor mosquitoes ; and yet the plant probably has another Sabethid 

 peculiar to it upon which the present species preys. 



LESTICOCAMPA CULICIVORA Dyar and Knab 



The larvae are predaceous on those of U'yeomia galoa in the red 

 ilower-sheaths of a Bihai (Hclicoui'a) species. (See note under 

 Wyouiyia galoa.) 



LESTICOCAMPA LEUCOPUS Dyar and Knab 



In the U. S. National Museum are four specimens of this species 

 received from Bocas del Toro (P. Osterhaut, collector). I did not 

 meet with it. 



Genus JOBLOTIA Blanchara 



JOBLOTIA DIGITATUS Rondani 



This and the following two species of this genus were abundant 

 in bamboo woods. The adults were sure to come to bite, and the 

 very similar looking, fat, short-tubed larvae were to be found in any 

 bamboo-joint, w'hich contained the thick, saturated, often ill-smelling 

 fermenting fluid, to which they seem partial. 



The present species, which is the Trichoprosopon nivipcs of Theo- 

 bald, has a wide distribution within the moist tropics. The writer 

 bred it in Trinidad from cacao husks, in wdiich the fluid was as thick 

 as gruel. Transferred to water, which is less rich in food, these 

 larvae remain alive unchanged for long periods. Some of my Trini- 

 dad larvae lived for four months after reaching Washington, and 

 some of the Panama material did nearly as well. The normal de- 

 velopment, under natural conditions, witb abundant food, takes 

 about two weeks. 



Eggs of the following species, which were laid May i, produced 

 the first adults on May 14, 1907: 



JOBLOTIA TRICHORRYES Dyar and Knab 



Bred commonly together with the above somewhat larger species 

 from bamboo near Tabernilla. The eggs are laid singly on the sur- 

 face of the water. They are elliptical, black, with four longitudinal 

 fringes of short white hairs from tip to tip. The larva issued from 

 one end. In a bamboo- joint, which I prepared and filled with water 

 at 5 o'clock on the evening of May i, I found the ne.xt morning at 

 9 o'clock some twenty such eggs, kept floating on the surface by the 

 hair fringes. Some of these eggs were submerged during transit to 

 the laboratory, and with the fringes once wet remained under water, 



