768 REPORT UNITED STATES GEOLOGICAL SURVEY. 



beyond the elytra, uearly meeting on the median line of the body. The eyes are dark 

 and conspicuous, being red, horseshoe-like spots. The antenn£e are laid upward and 

 backward on the base of the elytra and behind the legs. The tip of the abdomen is 

 smooth and unarmed. Length, 0.17 of an inch. 



The chrysalis lies in a cavity in the bean just large enough to receive 

 its body, there being as many as eight or twelve in a single bean. (Fig. — .) 

 This cavity is indicated by a round, sometimes oval, semi-transparent 

 spot 0.08 of an inch in diameter, the insect escaping through a thin orbic- 

 ular, almost transparent, lid, previously gnawn by the larva, which falls 

 off when the beetle emerges. The chrysalis is surrounded by a thin 

 cocoon like case, consisting of the castings of the larva (which are loug^ 

 cylindrical, when highly magnified), closely packed together. 



Though most of the pupse had, November 25, changed to beetles, 

 •which had deserted the beans, many had not changed, and two or three 

 out of the whole lot were in the semi-pupa state, the head and posterior 

 part of the body being unchanged. By this we could determine that 

 the larva closely resembled the larva of the true weevils in form. It is 

 a short, thick, fleshy, cylindrical, footless white grub. The tip of its 

 abdomen is rather blunt ; its head is rather small, white, with a pale 

 yellowish clypeus, while the mandibles are flat, short, and broad and red 

 in color. The rudimentary antenute form a flattened round area on 

 each side of the clypeus. The segments of the body are not convex, 

 being rather flattened, but the sutures are slightly impressed. The body 

 is a little iiattened beneath and very convex above, while the lateral or 

 pleural region of the body is well marked. Length, 0.16 ; thickness, 0.07 

 of an inch. 



Remedies. — The best remedy against its attacks is to careful!}^ exam- 

 ine the beans in the autumn and before sowing time, when their pres- 

 ence can be easily detected by the transparent spots made by the larva. 

 These should be burned, and such beans as are apparently uninjured 

 should be soaked for a minute in boiling-hot water, so that no beetles 

 be overlooked. 



Another Bruchus which is not uncommon in Colorado has been sent 

 me by Mr. F. G. Sanborn, and is Brttchus jtrosopis he Conte {Fig. 35). 

 As it is liable to attack the pea or bean in Colorado and the 

 Western Territories, I add a description and figure of it. It 

 resembles Bruchus fahce.! the body iDeing of nearly the same 

 Ijroportious. It is larger than that species, but the mark- 

 ings are very similar. It may be distinguished, however, by 

 the entire under side of the body being uniformly whitish. 

 Length, 0.20 inch. Another .species, like the other kindly 

 identified for me by Dr. E. H. Horn, is Bruchus amicus 

 Horn. It was inclosed in the same bottle with 5. jjrosopis. 

 Fig 2f)—Bru- ^^ ^^y ^^ ^"^® ^^ distinguished by its uniformly slate- 

 chmprosopis gray color above and beneath, not being spotted as usual 

 Le C. in the genus. It is slightly smaller than prosopis. 



The Bean Leaf-Hopper, Emponfabce (Harris).— Puncturing the leaves, causing them 

 to wither and die, and the pods to become rough and scarred ; a small pale-green leaf- 

 hopper. 



As I have had no personal expeHence with this insect, I copy Harris's 

 account and description of it: "I have found that the Windsor bean, a 

 variety of the Yicia faha of Linnaeus, is subject to the attacks of a 

 species of leaf-hopper, particularly during dry seasons, and when culti- 

 vated in light soils. In the early part of summer the insects are so 

 small and so light-colored that they easily escape observation, and it is 

 not till the beginning of July, when the beans are usually large enough 



