222 



fine glistening white curled tVread of excretion. Legs and antennae of the pupa 

 can not be made out, but after the imago has left the shell they are quite readily 

 traced in the exuvium. Antenna? short and stout, apparently 3-jointed, though 

 the divisions are much obliterated ; the last joint longest, almost as long as the other 

 two combined, with quite a number of irregular aunulations; tip provided with a 

 stout spine. Antenna- folded backward covering almost completely the anterior pair 

 <»f legs, which are projected forward. Legs short and very stout, especially the two 

 posterior pairs. There is scarcely an indication of a division between the dift'ereut 

 joints. Tarsus very short, stout, and rounded, with quite a long claw at tip. Anal 

 opening dorsal, semicircular, and protected by four slender, forward-directed hairs. 



Imago, $ (Fig. 24 c). — Length, 1.4""" ; expanse, 2.8""" ; four-jointed rostrum about 

 as stout as legs; joint 1 shortest, joint 2 longest, and about as long as 3 and 4 to- 

 gether; joint 3 somewhat longer than joint 1 and a little shorter than 4. Joint 1 of 

 the 7-jointed antennae very short, as broad as long, subcylindrical, slightly wider 

 distally ; joint 2 twice as long as 1, strongly clavate, and at tip somewhat broader 

 than 1, bearing 3 or 4 short hairs arising from small tubercles ; joint 3 longest, about 

 twice as long as 2, slenderer than this and with a very narrow insertion, rather 

 abruptly stouter at apical third, corrugated and terminating above in a small 

 callosity resembling a similar organ in Phylloxera; joints 4 and 5 sub-equal {,+ 

 lenoth, each nearly as long as 2, joint 5 bearing a short spine anteriorly near apex; 

 joints 6 and 7 sub-equal in length, each somewhat longer than 2, 7 with a stout spine 

 at tip; joints 4 and 7 somewhat corrugate or annulate, ])ut less so than apical third 

 of 3. The 2-jointed tarsi about half the length of the tibia, joint 1 of the hind tarsus 

 bearing 6 rather stout spines on each side ; joint 2 supporting at base 3 rather promi- 

 nent claws, the middle one longest. Ovipositor short, acute, and retractile. Eyes 

 divided into two by a curved pointed projection from middle of cheek, the upper 

 portion being smaller than the lower portion. Wings clear, colorless; costa ^''^=- 

 cately serrate. General color, light orange yellow, tip of rostrum black,. tarSi ' 

 part of tibia orange.. ! 



Imago, <? (Fig. 24 a).— The male resembles the female in all important respects 

 except in being smaller. Claspers about as long as preceding abdominal joint, or 

 one-fifth the length of the abdomen, curved gently upwards and inwards, each bear- 

 ing 4 or 5 equidistant minute cylindrical piliferous tubercles on upper and outer 

 edge; style almost as long as claspers, rather stout at base, more slender toward tip 

 terminating in a stout spine at upper end. Head and abdomen with heavy tufts of 

 wax soon after issuing from pupa. 



HABITS AND LIFE HISTORY. 



As a rule the insect passes the winter in the full-grown larval con- 

 dition. The detailed observations have all been made at Washington, 

 and dates and periods will doubtless vary considerably out of doors in 

 the Gulf States. Here, however, the adult insects issue during April, 

 and begin to lay their eggs about or before the middle of the month. 

 The eggs are attached to the under sides of the leaves by means of the 

 pedicel described above. 



Twenty-six females were examined by crushing the abdomens under 

 a cover glass, April 21, to ascertain the number of eggs. This was 

 found to vary from 7 to 25, but many of those examined had evidently 

 already oviposited to some extent, and it is safe to say that the aver- 

 age number is close to the maximum of these figures. 



Adults which have hibernated as full-grown larvte continue to emerge 

 as late as the middle of May, but where the leaves are badly attacked 

 so as to be practically incrusted with the insects, about 2 per cent never 



