38 BULLETIN 1201, U. S. DEPARTMENT OF AGRICULTURE. 



Furcraea cubensis Vent. Amaryllidaceae. Tropical America. 

 The writers' results are given on page 22. 



Galinsoga parvlflora Cav. Asteeaceae. 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, p. 107) reports that both of these are used as insecti- 

 cides. 



Gymnocladus dioica (L.) Koch. Caesalpiniaceae. Synonyms: G. canadensis 

 Lam., Guilandina dioica L. Kentucky coffeetree. Eastern United States. 



Von Mueller (91, p. 248) says : " Insects preying on the foliage of 

 this tree are poisoned by it." 



Chesnut (14, p. 28) reports that the leaves and fruit pulp have 

 been used, when rubbed up with milk, to poison flies. 



Pammel (64, p> 117) says: " In the South the leaves are used as 

 fly poison." 



The writers' results are given on page 22. 



Haplophyton, cimicidum A. DC. Apocynaceae. " Cucaracha " herb 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 

 herb 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. 247 et seq.) 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. 



Hedeoma 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. 



Helenium autuninale L. (Sneezeweed) and H. tenuifolium Nutt. (Bitter- 

 weed). Asteeaceae. Eastern United States. 



Riley (71, p. 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. 



