66 ILLINOIS BIOLOGICAL MONOGRAPHS [384 



inconspicuous, with several glandubae; maxillary palpi, (4, 2) 3, 1; labial 

 palpi with segments subequal; antennae conical, usually as wide as long. 



SPECIES OF ABIA 



1(2) Body with a broad dorso-mesal yellowish stripe between subdorsal lines; dorsum 

 above supraspiracular lines shaded brownish gray; head brownish gray except 

 front, genae, clypeus, and labrum which are lighter; ocellarae white; body dorsad of 

 supraspiracular lines shaded grayish or brownish, venter pale whitish-green; dorsum 

 between subdorsal lines yellowish white; body with four rows of minute black 

 spots; middorsal row with a large spot on annulet 7 and a smaller spot on annulets 2 

 and 4; subdorsal row with a large spot on annulet 7, with a bright yellow spot between 

 two black spots mentioned above; supraspiracular row with a spot on annulets 2 

 and 4 and a very small spot on annulet 7; subspiracular row with a spot at the 

 ventral ends of annulets 3 and 4; a yellow spot caudad of each spiracle; length, 



26 mm.; width of head, 2.7 mm.; on honeysuckle; semigregarious; Y-8.13 



amerkana Cresson. 



2(1) Body with a broad dorso-mesal yellowish stripe between subdorsal lines; dorsum 

 above supraspiracular lines not shaded brownish-gray, but body generally greenish . . 3. 



3(4) Pedal line without distinct more or less continuous smoky brownish gray band; 

 black spots directly ventrad of spiracles never present; second annulet without minute 

 but distinct spots dorsad of lateral large spots; head grayish brown except front, 

 genae, and clypeus, labrum lighter; ocellarae white; body entirely grayish green, 

 dorsum between subdorsal lines concolorous with other parts, the dorso-meson 

 with a narrow yellowish line; five rows of minute black spots: meso-dorsal row with 

 a larger spot on annulet 7 and a smaller spot on annulets 2 and 4; subdorsal row with a 

 larger spot on annulet 7 and very minute and often obscure spot on annulet 2, and 

 larger, distinct, often subdivided, spot on annulet 4, the latter two nearer to meson 

 than the regular subdorsal spots; lateral row with a large spot between annulets 

 2 and 3; supraspiracular row with a smaller spot on annulets 4 and 7; subspiracular 

 with a larger spot at the ventral end of annulets 3 and 4; a bright yellow spot between 

 mesal and subdorsal black spots on annulet 7; length, 28 mm.; width of head, 2.8 

 mm.; on Triosteum aurantiacum; Y-8.13-2, M-196 injlata Norton. 



4(3) Pedal line with distinct, more or less continuous smoky brownish gray band ; black 

 spots directly ventrad of spiracles always present, at least on majority of segments; 

 one or two minute black spots on second annulet dorsad of large lateral spots always 

 present; length, 30 mm.; width of head, 2.9 mm.; on honeysuckle; Y-104, G-583, 

 both from Urbana, HI. ; larvae resemble A . injlata in markings and general appearance 

 but differ as above Abia sp. 1. 



Subfamily Hoplocampinae 



Larvae (Fig. 15) small; body cylindrical, slender; segmentation and 

 annulation sometimes obsolete; third abdominal segment with four or five 

 annulets, annulets 2 and 3 or 2 and 4 setiferous or all annulets glabrous; 

 larvapods present on abdominal segments 2-7 and 10, glabrous or setiferous, 

 sometimes very rudimentary; ventral glands usually present on the meson 

 of abdominal segments 1-7; body greenish or yellowish, striped or spotted 

 or without any markings; tenth abdominal tergum with or without suranal 

 protuberances, if present, often more than two in number; antennae 



