592 



REPORT OF THE COMMISSIONER OF AGlilCULTURE. 



EXPLANATION TO PLA'l.'E V. 



(Photo-engraved from a photofjraph.) 



Spraying outfit used in California in operation 

 agaiiist the Cottony (Jiisbion-seale. 



EXPLANATION TO PLATE VI. 

 THE SOUTHERN BUFFALO-GNAT. 



(Original.) 



Fig 

 Fig, 



Fig. 



Fig. 

 Fig, 



Fig 

 Fig, 



6.- 



Simulhim pvciiurum: Larva — enlarged. 

 ■a, ventral view of head of larva; b. lat- 

 eral ; c. dorsal view of same— all greaily 



enlarged. 

 -a, men turn of larva; b, labium, c, labrum 



of same— ail greatly enlarged. 

 -Pro-leg of larva— greatly enlarged. 

 -a, antcmia of larva; i», mandible of same 



—greatly enlarged; c, tip of mandible — 



still more enlarged. 

 -Maxilla of larva— greatly enlarged. 

 -Tip of abdomen of same, showing breath- 



mg organs — greatly enlarged. 

 Fig. 8.— Pupa— enlarged ; a, 6, c, spines of dorsal 



and ventral surface of abdomen of 



same— still more enlarged. 



EXPLANATION TO PLATE VII. 



THE SOUTHERN BUFFALO-GNAT AND THE 

 TURICEY-GNAT. 



(Original.) 



Fig. 1. — Sinudinm pecuarum: Fan of larva — 

 greatly enlarged. 



Fio. 2. — Sinndiummeridionale: Larva — enlarged. 



Fig. 3. — Same: a, antenna; b, mandible— greatly 

 enlarged ; c, tip of mandible— still more 

 enlarged. 



Fig. 4.— Same: ilentum— greatly enlarged. 



Fig. 5. — Same: Breathing organs — greatly en- 

 larged. 



Fig. 6. — Same: a, empty pupa-case; b, case with 

 pupa projecting from it— enlarged. 



EXPLANATION TO PLATE VIII. 



BUFFALO-GNATS. 



Fig. 1. — Siviulium pecuarum: Head of adult 

 male — greatly enlarged. (Original.) 



Fig. 2. — Same: Head of adult female— greatly en- 

 larged. (Original.) 



Fig. 3. — Same: Adult female from side— enlarged. 

 (Original.) 



Fig. i.—Simnlmm meridiontUe: Adult male froni 

 side— enlarged. (Original.) 



Fig. b.—S. pccnaritm : iJors;'.! view of adult fe- 

 maie--enlarged. (Original.) 



Fig. 0.--S. rueridionulc: Dor.«al view of adult fe- 

 male— enlai-ged. (Original.) 



Fiti. ".—Simidiutn s]). : a, portion of egg-masa 

 from side; b, .=;ame, i"rc:n top; <.•, d, indi- 

 vidual eggs— enlarged. (After Barnard.) 



EXPLANATION TO PLATE IX. 



Fig. 1. — Larva of Chironomitssp.: a. dorsal view 

 with pediform appendages retracted 

 and jav.'s closed; o, lateral view with 

 same parts ext<?nded; c, egg-mass — all 

 enlarged; cZ, maxiUary palpus: e, labial 

 palj)us; /, labium; ^r, juandible- still 

 more enlarged. (After RUey.) 



Fio. 3. — Chironomus pluviof-un: a, adult, dorsal 

 view: b, pupa, ventral view — enlarged. 

 (Original.) 



Fig. B.—Hydropsijcne sp.: a, dorsal view of larva 

 —enlarged; o, side view of anal hook 

 of same— stiU more enlarged. (Orig- 

 inal.) 



Fig. 4.— Same: Side view of head and first thi> 

 racic segment of larva — enlarged. 

 (Original.) 



Fig. 5.— Same: Yv'eb of larva — enlarged. (Re- 

 drawn from Clarke.) 



EXPLANATION TO PLATE X. 



THE FALL WEB-\\'ORM. 



(Original.) ♦ 



Fig. 1.— a, dark larva from side; h, light larva 

 from above: c, dark larva from above; 

 d, pupa, ventral viev/; e, pupafromside; 

 /, adult— all .slightly enlarged. 



Fig. 2. — a-j, wings of a series of adults, showing 

 graduation from pure white t'cna 

 (cimca) to one profusely spotted with 

 black and brown ( punctatissimay—natr 

 ural size. 



Fig. 3. — a, moth ovipositing upon leaf— natural 

 size; b, a few eggs iiisitii — enlarged. 



Fig. 4. — Meteorus hyphardrice. a, adult; b, co- 

 coon-enlarged. 



EXPLANATION TO PLA.TE XI. 



(Photo-engraved from a pliotograph.) 



VioTV of a Washington street in late September, 

 188(3, showing complete defoliation of 

 the Poplars on the west side and almost 

 complete exemption of the Maples oil 

 the east side. 



