12 



THE CANADIAN ENTOMOLOGIST. 



TWO NEW SPECIES OF ORTHEZIA. 



BY J. D. TINSLEV, MESILLA PARK, NEW MEXICO. 



Orthezia cheiiani/ii, n. sp.— Adult ?. Length, 3.5 mm. Width, 

 3-3.5 mm. Length + ovisac, 6-8 mm. Width of ovisac, 3-4 mm. 

 Body above covered with white secretion, which forms lateral and sub. 

 dorsal lonsitudinal keels. A well-defined subdorsal furrow between the 

 keels and the lateral margin formed by 3 or more rows of plates ; these 

 are smaller than the projecting marginal plates, which are flattened ; 

 caudal plate and the 3 or 4 plates on each side of it very little longer 

 than the lateral plates. The structure of the secretion is compact ; in 

 most of the other species of Orthezia it is fluffy. 



Ovisac with distinct longitudinal ridges above and nearly as distinct 

 ridges below. 



Legs and antennae sepia brown, of nearly same shade throughout. 

 Tibia about as long as femur, tarsus about half as long as tibia, claw only 

 slightly curved. Femur 532 /x, tibia 471 ji, tarsus 289 /x, claw 90 /x. 

 Tibiai and tarsi with several rows of spines. Antennse 

 (Fig. i) with 8th joint longest, then 3rd, then ist, then 4th, 

 5 and 7 next and subequal, 2 and 6 shortest and subequal. 

 For measurements see figure. Formula 83i4(57)(26). 

 Derm with numerous small spines. 

 Larvce. — % . Legs and antennae sepia brown. 

 TibipB decidedly longer than tarsi, claw long and slender, 

 slightly curved. 



Antennae 6-jointed \ 6 the longest, but not so long as 

 3 + 4 + 5 j 3 usually longer than 4 or 5 ; 5 shortest. Formula 



- 631245. 

 Habitat. — In Canons of the Organ Mts., New Mexico, on 



- Cheilanthes Fendleri, Hook, at altitudes from 4,500 to 7,500 

 feet. The adult $ is usually found just beneath the surface 



of the soil, and the larvse occur mostly upon the rachises of the fern. 



Remarks. — This species is closely allied to O. annce, Ckll., but 

 differs from it in the following points : 



(a) The secretion is more compact ; the space between the subdorsal 



keels is wider and the keels are not so prominent. The mar- 

 ginal plates are more flattened. 



(b) Colour of legs and antennae is uniform, while in annce the fen^ora 



an4 tarsi arq much darker th^n the til^ise, 



Fig. 



