NATUKAL ENEMIES OF COREIDS. 91 



Leptoglossus zonatus Dall. 



Leptoglossus zonatus was observed by the writer to be fairly 

 numerous in cotton fields at Tlahualilo, Durango, Mexico, in Sep- 

 tember, 1904, but in the same locality, in July, 1905, not a specimen 

 was found although cotton fields were visited daily during the month. 

 It is not likely that this bug will ever become common in cotton fields 

 in this country except possibly in certain districts in the semiarid 

 region of western Texas. 



OTHER COREIDS KNOW^N TO ATTACK COTTON. 



In the Agricultural Report for 1855, Glover mentioned AcantJio- 

 cepJiala femorata ^ (PI. I, fig. 5) as an insect frequently found in cotton 

 fields in Florida. Professor Comstock ^ in his Report on Cotton 

 Insects, 1879, quotes from a statement by Mr. W. Trelease, to the effect 

 that these bugs were several times observed to catch and suck the 

 juices from the bodies of cotton caterpillars, Alabama (Aletia) argillacea 

 Hbn. It was consequently concluded that at that time the knowl- 

 edge concerning the habits of the bug favored its being considered a 

 friend of the cotton grower. Ashmead ^ stated in regard to this species 

 as observed by him in Mississippi in 1893 that it was '^captured 

 several times puncturing young bolls and while not especially numer- 

 ous does considerable damage." 



The flat-horned Coreid (Cliariesterus antennator Fab.) is recorded 

 by Ashmead as common in cotton fields in Mississippi. Prof. E. D. 

 Sanderson^ has given brief notes on two species, Corizus pictipes 

 Stal and Jadera Tisematoloma H.Schf., which are frequently found on 

 cotton, although by themselves not in sufficient numbers to do appre- 

 ciable damage. In addition to the above-mentioned species of 

 Coreids the writer has occasionally found on cotton a strikingly 

 marked bug, Hypselonotus fulvus De G., which may appropriately be 

 known as the banded-legged Coreid. This insect occurs commonly 

 in southwestern Texas, but is not usually found on cultivated plants. 



NATURAL ENEMIES OF COREIDS DESTRUCTIVE TO COTTON. 



Mr. R. C. Howell, formerly a field agent of this Bureau, collected, 

 on August 15 at Sulphur Springs, Tex., a batch of 42 eggs of a species 

 of Leptoglossus, which had been deposited on the bract of a cot- 

 ton square. From these eggs 3 Proctotrypid parasites emerged, 

 which Doctor Ashmead determined as Hadronotus anasx Ashm. 

 This parasite was first reared from the eggs of the squash-bug 



a Referred to as Anisoscelis ?, p. 95, PI. VIII, fig. 9. 



& Report on Cotton Insects, p. 168, U. S. Dept. Agr., 1879. 



c Insect Life, Vol. VII, p. 320, 1895. 



d Bui. 57, Bur. Ent., U. S. Dept. Agr., pp. 46-47, 1906. 



