38 BULLETIN 1201, U. S. DEPARTMENT OF AGRICULTURE. 
I'urcraea cubensis Vent. Amaryllidaceae. Tropical America. 
The writers' results are given on page 22. 
Galinso.ua parviflora Cav. Astf:raceae. Galinsoga. South America, intro- 
duced in the United States. 
The writers' results are given on page 22. 
Gouania lupuloides (L.) Urban (synonym G. domingensis L.) and G. poly- 
gama (Jacq.) Urban (synonym G. tomentosa Jacq.). Rhamnaceae. Trop- 
ical America. 
Greshoff (33, />. 107) reports that both of these are used as insecti- 
cides. 
Gymnocladus dioica (L.) Koch. Caesalpiniaceae. Synonyms: G. canadensis 
Lam.. Ouilandina dioica L. Kentucky coffeetree. Eastern United States. 
Yon Mueller (91, p. 248) says: " Insects preying on the foliage of 
this tree are poisoned by it." 
Chesnut (14, V- &$) reports that the leaves and fruit pulp have 
boon used, when rubbed up with milk, to poison flies. 
Pummel (64, p- 117) says: "In the South the leaves are used as 
fly poison." 
The writers' results are given on page 22. 
Haplopbyton eimieidum A. DC. Apocynaoeae. " Cucaracha M lierb of Mex- 
ico. Arizona to Guatemala and Cuba. 
Greshoff (31, p. 107) lists this as an insecticide. 
According to the Experiment Station Record (7), " The cucaracha 
lierl) is reported as being an effective remedy for destroying lice and 
fleas on dogs, cockroaches, mosquitoes, and other insects. The pest 
plant costs 1 ct. [centavo] per kilo and may be used in infusion." 
Herrera (40, p. 21, 69-71, 188) states that he had considerable suc- 
cess in poisoning Culex, Anopheles, various species of Instrypetas, 
and other Diptera by using the juice and infusion of the leaves, the 
juice and infusion of the entire plants, the maceration of the bark, 
and the concentrated alcoholic extract. He also states that an at- 
tempt has been made to cultivate this plant for the purpose of obtain- 
ing insecticidal material. The same author (41, p. %$ of *cq.) sum- 
marizes the results of his earlier paper and furthermore describes the 
action of this plant on insects, names other plants similar to the herb 
of cucaracha, and briefly discusses the composition of the toxic prin- 
ciple found in these plants. 
Bedeoma pulegioides (L.) Pers. Menthaceae. Synonym: Cunila pulegioides 
L. American pennyroyal. Eastern United States. 
Riley (71, p. 185) states that the infusion, decoction, and alcoholic 
extract were ineffective against cotton caterpillars. 
Lyons (S3, p. 223) reports that it is used to drive away mosquitoes. 
Eeleninm aiitumnale L. (Sneezeweed) and H. tennifoliuni Nutt (Bitter- 
weed). Asteraceae. Eastern United States. 
Riley (71, j>. 184) reported that these plants rendered cotton plants 
so obnoxious to cotton caterpillars that the insects would not feed 
upon them, but the caterpillars were not killed. The decoction, 
infusion, and alcoholic extract were without effect, as were likewise 
the dried and powdered flower heads. 
The writers* results, obtained by using the latter species, are given 
on page 22! 
