10 



BULLETIN 192, U. S. DEPAETMENT OF AGRICULTURE. 



It is often stated in Porto Rico that ants destroy certain vegetable 

 seeds after they have been planted in the soil. The ^vriter has been 

 told on good authority that ants, which from the description were 

 apparently the ''hormiga loca" or ''crazy ant," Prenolepis longicornis 

 Latr., were seen to dig smaU holes along the rows in a propagating 

 box in which lettuce had been planted, remove the seeds, and carry 

 them away. 



DIPTERA. 



Agromyza parvicornis Loew. 



The "corn-leaf blotch miner," which has been recently made the 

 subject of a paper ^ by Mr. W. J. PhiUips, is present in Porto Rico, 

 adults having been reared from larvae found working in leaves of 

 corn at Rio Piedras. 



SUMMARY. 



The following summary, arranged alphabetically according to 

 host plants, indicates the insects known to attack the various vege- 

 table crops grown in Porto Rico. The ''changa" {ScaiJteriscus 

 didactylus Latr.) is credited in this hst as injuring only those plants 

 which, according to Mr. Barrett, are most affected, though in reaUty 

 the Ust of plants attacked by it is not so limited. 



Beans: 



Eutellix tenella Baker. (?) 

 Eudamus proteus L. 

 Empoasca mali Le B. 

 Cerotoma denticornis Oliv. 

 Nacoleia indicata Fab. 



Beets: 



Pachyzancla bipunctalis Fab. 



Cabbage: 



Scapteriscus didactylus Latr. 

 Plutella maculipennis Curtis. 

 Pieris monuste L. 



Celery: 



Pseudococcus sp. near citri Risso. 



Com: 



Peregrinus maidis Ashm. 

 Pseudococcus sp. near, citri Risso. 

 Diabrotica graminea Baly. 

 Laphygma frugiperda S. & A. 

 Heliothis obsoleta Fab. 

 Agromyza parvicornis Loew. 



Cucumber: 



Aphis gossypii Glov. 



Diabrotica bivittata Fab. 

 1 Phillips, W. J. Corn-leaf blotch miner [Agromyza 

 V. 2, no. 1, p. 15-31, 6 figs., 5. pi., Apr. 15, 1914. 



Cucumber — Continued. 



Diabrotica innuba Fab. 



Diaphania hyalinata L. 

 Eggplant: 



Saissetia hemisphserica Targ. 



Hemichionaspis viinor Mask. 



Corythaica monacha Stal. 



Scapteriscus didactylus Latr. 



Epitrix cucumeris Harris (?). 



Pachyzancla periusalis Walk. 

 Horse-radish: 



Pieris monuste L. 

 Kale: 



Pieris monuste L. 



Plutella maculipennis Curtis. 

 Melon: 



Aphis gossypii Glov. 



Diabrotica bivittata Fab. 



Diabrotica innuba Fab. 

 Mustard : 



Pieris monuste L. 



Plutella macidipennis Curtis. 

 Okra: 



Diaspis pentagona Targ. 



Diabrotica graminea Baly. 



Solenopsis geminata Fab. 

 parvicornis Loew]. In U. S. Jour. Agr. Research, 



