170 



Genus Aphorura MacGillivray 



Tliese insects are small and white, without eyes, and with an 

 inferior claw. The postantennal oi'^ans are present and also 

 the psendoeelli. They are very abundant in soil and under 

 stones. 



Key to the Genus Aphorura 



A. Anal horns wantini*'. sp. ? 



A A. Ar;al horns two. 



B. Color yellow, each postantennal organ composed of 



nine tubercles. lutea 



BB. Color white. Each postantennal organ composed of 



eleven tubercles. montiA 



Aphorura sp. ? 



I have been unable to identify this species. 



Description: Color — White. Antennae — Shorter than head; 

 antennfp sense bulbs present, five at the distal end of the third 

 segment, and two blunt curved hairs at the distal end of 

 segment IV. Eyes — Wanting. Postantennal organ — Present. 

 Psendoeelli — Present; two at the base of each antenna, two on 

 the anterior portion of the head, four on the posterior portion, 

 six on thorax TI and IIT, four on abdomen I; six, abdomen IT, 

 III, IV; ten, abdomen V; two, abdomen VI. Claws — Two, 

 unarmed; superior tapers quickly to a sharp point; inferior, 

 dilated at base, ending in a seta reaching to end of superior 

 claw. Anal horns — Absent. Integument — Finely granular, 

 hairs few, short and straight. 



Hahitaf: In dirt underneath fern in San Antonio Canyon 

 above Ice House Canyon ; altitude 5000 feet ; few ; December. 



AphoDira luff a Bacon 

 Aphorura lutea Bacon, 1913. P. C. jr. ent. and zool., vol. V, 



pp. 43-46. 



Description: It closely resembles Aphorura niontis in gen- 

 eral appearance, length, size and shape of the body. It differs 

 though in color and the ])ostantennal organ. Color — Yellow 

 Antennae — Shorter than head. Two rows of antenna! organs on 



