INSECTS INJl'KIOrS TO THE LOCO WEEDS, 



37 



The insect is shown in it> diticrcnt stages, highly nmgnitiecl, in 

 figure I), The size is indicated hy the hairlines at the right of the 

 figure. It will he noticed that the female fly ('") is larger than the 



Fig. 0. — Fickle midge [i^ciara iiiroiisttiii)^) : u, Male rly ; b. exieruai lieuital orsans 

 c, female ; (/, enlarged antennal joints of same ; e, maxillary palpus of same ; 

 abdomen of female from side ; y, pupa, ventral view ; h, larva, dorsal view 

 Much enlarged; h, d, c, j, more enlarged, (.^^uthor's illustration. I 



of male ; 

 1, tip of 

 , c, (J, h. 



male. The latter (a) is recognized by its claspers, shoAvn much en- 

 larged at h. The larva is a delicate, thread-like maggot of milk-white 

 coloi- Avith a jet-black head. On account of its minute size — about ^ 



of an inch in length — its presence is very 

 frequently unnoticed in greenhouses, al- 

 though the flies are more conspicuous, from 

 I heir habit of flying about on the "glass." 

 In some cases this species is confused with 

 nematodes or eel-worms," 



THE FOUR-LINED LOCO WEEVIL, 



{ClcoHH-H tjinidril incut IIS Chevr. i 



This curculionid weevil was found breed- 

 ing in considerable numbers on Araffallus 

 lombcrti at Hugo. Colo., during 1907, by 

 Dr. C, D, Marsh, who reports very appre- 

 ciable injury. As a rule. how(>ver, this 

 Fui. 10.— Four-lined loco weevil j-pecics does uot occur ill numl)ers until 



(Clconiis Quailrilincatiis): Adult. i!i xi i ^ i i i ^i 



.Much enlarged (original). =^"'^'' ^he plants have made good growth 



and have >ee(led. 

 This beetle, (fig. 10) measures about half an inch in length; has a 

 .stout rostrum or beak, a little shorter than the thora.x: is black, and 

 densely coated with gray pubescence alternating with two pairs of 

 longitudinal black lines, one subsutural and the other submarjrinal. 



"A more couii)let<' account of this insect appeared in Iliil. JT, ii. s., I»iv. Ent. 

 r, S. I»ept. Agrio., iip. los-ii:^,. lOOl. 



