1920] Peirson — An Infestation of the White-Pine Aphid 63 



aphids in spite of heavy rains and low temperatures was remarkable, 

 subsequent examinations showed them feeding up until about the 

 first of November. Very few winged individuals were found. 

 The oviparous females are brownish black in color, with a white 

 line along the middle of the thorax. The antennae are pale, with 

 black tips. 



The eggs are smooth and elongate, averaging .12 mm. in length 

 by .02 mm. in breadth. They are of a pale yellow tinge when first 

 laid, but in a few hours the color changes to a dark orange, and 

 later to a shiny jet black. 



TWO NEW SCHENDYLOID CHILOPODS FROM 

 GUATEMALA. 



By Ralph V. Chamberlin, 

 Museum of Comparative Zoology, Cambridge, Mass. 



The interesting new chilopods described below are represented 

 by single specimens taken from soil about the roots of the pacaya 

 or salad palm (Chamtedorea sp.) from Coban, Guatemala, at 

 quarantine in Washington, D. C, January 29, 1920, by Messrs. 

 W. B. Wood and H. L. Sanford and transmitted to me for identi- 

 fication from the United States Bureau of Entomology. In addi- 

 tion to the two chilopods, two diplopods were also found, these 

 being Orthomorpha coarctata (Saussure) and Cleidogona sp., the 

 latter being represented by an immature specimen which is possibly 

 C. stolli Pocock. 



Sogolabis gen. nov. 



Labrum not free, forming an arc armed with an even series of 

 teeth much as in, e. g., Adenoschendyla. 



Claw of palpi of second maxillse long, the margins smooth, 

 neither pectinate or spined. Pleurosternal suture of second 

 maxillae complete, sharply marked, the pleurite extending forward 

 to coxosternum. 



No ventral pores present. 



Coxopleural pores of pregenital segment small, simple, several 

 on each side as in Escaryus. 



Anal legs composed of six articles beyond coxopleura, without 

 claw. 



