234 ^ YEAR OF COSTA RICAN NATURAL HISTORY 



Castnia, also lived in this plant, and in the mud between some 

 of the leaves dwelt a fair-sized earthworm {Andiodrilus 

 biolleyi), quick in its movements and with a peculiar smooth 

 proboscis which was frequently thrust out and looked like 

 a spine. -^ 



In the first and second bromeliads were also a large scor- 

 pion six inches or so in length, which continually got away 

 from me into the deeper recesses so that I had but momen- 

 tary glimpses of it; round beetle larvae of the "June bug" 

 style, a species of snail (two species if the owners of empty 

 shells found also lived here), earwigs, smaller ants, isopods, 

 collembolans and a smaller species of earthworm. 



Most of December 17 was spent in the Reventazon ex- 

 ploring bromeliads. Some we tried to reach were perched 

 too high, as we discovered when we attempted to throw the 

 rope around them. But we did succeed at last in pulling 

 down a big one, although it took all our combined weight 

 and strength, and were rewarded by finding seven or eight 

 dragonfly larvae of different sizes. This bromeliad, among 

 other animals, contained a few of the black Odofitomachus, 

 so that their presence does not necessarily preclude the 

 existence of dragonfly larvae in the same cluster of plants. 

 We found the bromeliad examined on October 3 lying on 

 the ground where it had fallen and when we tapped upon it, 

 out rushed these ants. They had not been disturbed in their 

 housekeeping by having their house turned upside down. 



Other bromeliads in this valley which we examined in 

 March contained no dragonfly larvae but many planarians 

 {Rhynchodemus bromelicola), flat worms 20 mm. (^ inch) 

 or more in length, striped lengthwise with black and dull 

 yellow. 



' For further details see Entomological News, XXII, p. 405, Philadelphia, Novem- 

 ber, 191 1, and the Ento?nologists'' Monthly Magazine (2) XXIV, pp. 2-5, London, 

 January, 1913. 



