LOCUST SCALE-INSECT. 371 



21. Cymatophora crepuscularia Tr. 



Order L^pidoptera ; familj' Phal^enid^. 



LarvsB from which the above was bred were taken on white clover 

 at Normal, Jime 21, the imagos emerging July 10. 



Larva. — One inch long, slender, with only four prolega. The head is widely bilobed 

 and reddish brown above, yellowish varied with reddish brown in front, with two 

 small approximate black spots on the middle of the front. The body is green, thickly 

 covered with white granulations, with some black ones intermixed, and has an ob- 

 scure reddish dorsal stripe. The posterior margins of the middle segments are nar- 

 rowly bordered with yellow. On the penultimate segment is a large transverse 

 blackish spot, with two small kidney-shaped yellow spots near its middle, approach- 

 ing each other posteriorly. The legs are pale brown, blackish at base ; prolegs black 

 without, pale within; spiracles brown. 



The same larva occurred in our collections on the rose and the com- 

 mon locust ; taken from the former June 20, and from the latter July 

 4. We also collected it July 25, from the box elder {Negundo aceroide/t), 

 the specimen pupating August 4 and emerging August 13. It has 

 been found preying on the clover by Professor Forbes (Third Rept. 

 Ins. Illinois). 



22. A Deltoid larva. 



A pale green caterpillar was observed at Brunswick, August 21, feed- 

 ing on the under side of the leaf, and easily escaping detection since it 

 was of the same hue as the under side of the leaf. September 14 it had 

 made an oval-cylindrical cocoon in the soil at the bottom of the breed- 

 ing box, the pupa being of the usual mahogany brOwn color. 



Larva. — Pale green ; body slender cylindrical, of the usual Hypena-like shape. Head 

 as wide as the body, smooth, pale green ; a dark green dorsal median line: a narrow 

 thread-like subdorsal white slender line, and a much broader one lower down. All 

 the legs green, thoracic oues a little chitinous at the end. The dorsal tnbercles 

 arranged in a trapezoifl, but they are minute and give rise to very slender inconspicu- 

 ous hairs. Length 17™™. 



23. Macrohasis unicolor (Kirby). 



Dr. John Hamilton states that a nursery of young locusts was almost 

 defoliated in July by swarms of this beetle. (Can. Ent., xxi, 103.) 



24. The rapacious scale insect. 

 Aspidiotus rapax Comstock. 



Like the pernicious scale insect {Aspidiotus perniciosus) this species 

 infests many different plants ; and sometimes it occurs in such great 

 numbers as to be very destructive. This is especially the case on ever- 

 greens in hot-houses in the North or in the open air in the South ; and 

 in California on olive and mountain laurel ( Umbellularia calif ornica). 

 1 have also found it on the following-named plants in California: Al- 

 mond, quince, fig, willow, eucalyptus, acacia, and locust. (Comstock). 



