INSECTS INJURIOUS TO THE LOCO WEEDS. 



87 



The insect is shown in its different stages, highly magnified, in 

 figure 9. The size is indicated by the hairlines at the righl of the 



figure. It will be noticed that the female fly (c) is larger than the 



Fig. 9. — Fickle midge (Soiara inconstans) : a, Male fly; 6, external genital organs of male ; 

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

 abdomen of female from side ; g, pupa, ventral view ; h, larva, dorsal view, a, c, <j, h, 

 Much enlarged ; b, d, c, J, more enlarged. (Author's illustration. > 



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

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

 color with a jet-black head. On account of its minute size — about i 



of an inch in length — its presence is very 

 frequently unnoticed in greenhouse-, al- 

 though the flies are more conspicuous, from 

 their habit of flying about on the " glass." 

 In some cases this species is confused with 

 nematode- or eel-worn i-. 



THE FOUR-LINED LOCO WEEVIL. 



(Cleonvs quadrilineatus Chevr.) 



This curculionid weevil was found breed- 

 ing in considerable numbers on Aragall\i% 

 lamberti at Hugo. Cola, during 1907, by 

 Dr. C. I). Marsh, who report- very appre- 

 ciable injury. As a rule, however, this 

 species does not occur in numbers until 

 after the plants have made good growth 

 and have seeded. 

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

 Mont rostrum or beak, a little shorter than the thorax: is black, and 

 densely coated with gray pubescence alternating with two pairs of 

 ck lines, one subsutural and the other submarginal. 



Fig. io.— Four-lined looo weevil 



I '7,,, /,,/.s- quadriUneatus): Adult. 

 Much enlarged (original). 



longitudinal bla< 



"A more complete account <>f this insect appeared in Bal, % 

 r. s. Dept. Agric, pp. 108-113, 1901. 



n. s.. Div, Km.. 



