— 177— | ' 



of the species which up to the time had been seen. They bear a close 

 resemblance to the more common viviparous female of the root form as 

 the following description will show: — ; 



The oviparous Female Aphis maidis {root form). — General color dull 

 green; body covered with a glaucous bloom. Above, head dusky, 

 prothorax chiefly dusky, the three succeeding segments each with a 

 median transverse dusky blotch, all the segments behind the prothorax 

 with a marginal and submarginal series of dusky specks on each 

 side. Below, head and prothorax dusky, two dark spots outside the 

 coxa of the middle leg, adusky line before the coxa of the hind leg, ab- 

 dominal segments with two series of dusky specks on each side and -a 

 pair of dark spots before the cauda. Antennae, two basal articles, third 

 and fourth at tips and fifth and sixth chiefly dusky. Eye brownish red. 

 Rostrum dusky. Anterior and middle legs 'with the coxae, femora ex 1 

 cept at bases, tibiae at tips and tarsi except bases' dusky. Posterior leg, 

 excepting the extreme base of the femur, black. Cornicles black. Cauda 

 with black border. Body stout, its greatest width at about the middle. 

 Outline of front seen from above incurved "medially. Antenna with 

 first and second articles equal in length, the first stoutest; third article 

 about equal in length to the fourth and fifth together^ the latter nearly 

 equal in length and similar in form; basal part of sixth article shorter 

 than the distal part, about equal to the fifth in length. Cornicles short, 

 not at all swollen at the middle. The limbs and the cauda have the 

 usual slight pubescence of members of the genus Aphis. Length 6f 

 body 2.27 mm.; Width of body 1.20 mm.; Antenna .80 mm.; Cornicle 

 .20 mm Perfectly developed eggs taken from the ovaries are ova'l ; iri 

 shape, pale yellow in color and measure about .73 mm. In addition to 

 the discovery of the oviparous female of the root form another interesting 

 fact in the life history was observed during the season. A careful look- 

 out was kept for any tendency of the plant lice both within and outside 

 the enclosed frame to breed on plants other than corn, and on the 30th 

 of August indubitable Aphis maidis of the aerial form were found not un- 

 common in places on young grasses which later proved to be Panicum . 

 After this date they were repeatedly found on the grass. All those ex- 

 amined from the grasses were apterous viviporous females and young. 



Prof. Forbes in reply to a question stated that ants were in the 

 habit ol collecting aphides and stowing them in their nests for winter use. 



The following paper was then read: 



A Dangerless, Vegetable Insecticide for Collecting Bottles. 

 W. L. Devereaux, Clyde, N. Y. 

 Instructions on collecting insects even in recent important works 

 like Appleton's series, advise the use of chloroform for killing insects. 



