30 BULLETIX 1201, U. S. DEPARTMENT OF AGRICULTURE. 
Delphinium staphisagria L. Lousewort. Mediterranean region. 
Hare. Caspari, and Rusby (38) say that this species is employed in 
medicine solely as a local application for the destruction of lice and 
the itch-mite. 
Delphinium sp. Larkspur. 
Osborn (63, p. 175) reports that Tenny recommends a decoction of 
the seed of common larkspur as an insecticide against the short- 
nosed ox louse. 
Cook, Hutchison, and Scales (17, p. 14) found that a sulphuric- 
acid extract of the ground seed had a considerable effect on fly larva'. 
and Cook and Hutchison (18, p. 4) obtained similar results by using 
an infusion of the ground seed, but none of these were efficient. 
Derris elliptica (Wall.) Benth. Fabaceae. Malayan or East Indian fish- 
poison. Aker. Tuba. Malayan region. 
See " Derris as an insecticide." bv Mclndoo, Sievers, and Abbott 
The results obtained during this investigation by the writers are 
given on pages 7, 10 to 20. 
Derris uliginosa Benth. Eastern fish-poison. Old World Tropics. 
Perredes (67) says: "In India it is known to act as a poison upon 
worms and the larva 1 of insects which trouble the cultivators, whence 
the Marathi name Kirtana. or l worm-creeper.' " 
Howard (44, P- 78) reports that a decoction placed in water at 
the Wellcome Research Laboratories at Khartoum had considerable 
potency against mosquito larvse, but also killed the fish present in 
the water. 
Diospyros malacapai A. DC. Ebenaceae. Philippine Islands. 
Greshoff (SI. p. 103) reports the wood as an insecticide. 
Ecbinops echinatns Roxb. Asteraceae. East Indies. 
Greshoff (33, p. 160) , quoting Burkill, says : " The roots are 
pounded and applied to the hair to destroy lice, also the powdered 
roots applied to wounds in cattle to destroy maggots." 
Eucalyptus glohulus Labill. Myrtaceae. Blue gum. Victoria and Tasmania. 
Yon Mueller (91, p. 192) says: "Warren reports from San Fran- 
cisco that branchlets of eucalyptus will drive mosquitoes and other 
insects out of rooms." 
Eucalyptus spp. 
Riley and Howard (73, p. 268) quote a correspondent who says 
that a' few twigs or leaves laid on the pillow at night will secure 
pet Feet immunity against mosquitoes. 
Sanders (77, p. 344) says that when a grove of eucalyptus is 
planted near the house mosquitoes never give annoyance in the house, 
but Howard (43, p. 6'.?. and 44. p. 2%) states that eucalyptus trees are 
probably of no value as mosquito repellents. 
Howard (43, p. 59), quoting Celli and Casagrandi. says that the 
fumes IVoln the fresh leaves will kill mosquitoes if the air is 
saturated. 
