THE CANADIAN ENTOMOLOGIST. 



13 



(c) In anncB joints i and 2 of antennse are equal, and 3 is a third 

 longer than 2, antennal formula being 83(i2)(45)(67). 



Ortluzia graminis, n. sp. — Adult 9 . Length, 2-3 mm. Width, 2 

 mm. Length + ovisac, 6-13 mm. Width of ovisac, 2.5 mm. Colour, 

 piceous. Body above with subdorsal and lateral keels ; between the 

 subdorsal and lateral keels the body is naked and shows up as a black 

 band on each side, so that the dorsum appears to have three white longi- 

 tudinal bands and two black longitudinal bands. Subdorsal keels slightly 

 widest posteriorly. Lamellse of lateral keels lengthening posteriorly. All 

 the posterior lamellse about subequal, and free from the firm chalk-white 

 ovisac, which is longitudinally ridged dorsally and nearly smooth ven- 

 ^rally. 



Legs and antennae dark sepia brown. 



Terminal segment of antenna darker than the others. 



Tibia slightly longer than the femur ; tarsus slightly more than half 

 as long as the tibia. 



Claw large, nearly straight. Femur 547 /x, tibia 593 /x, tarsus 320 /x, 

 claw 83 /x. 



Spines on tibia and tarsus small and not very numerous. 



Antennas (Fig. 2) with 3rd joint usually longest, 

 although 3 and 8 may be subequal ; 7th joint always the 

 shortest; the other joints vary very much in their relative 

 lengths in different specimens, so that no accurate formula 

 can be given. 



For measurements see figure. The antennae have a 

 few small, scattered spines. 



La7'vce. — The larva? appear to have 3 black and 4 

 white longitudinal bands, since the body shows up black 

 between the subdorsal, and the subdorsal and lateral keels. 

 Legs and antennpe sepia brown. Tibife and tarsi about sub- 

 equal in length, both shorter than the femure. Claw slender 

 and curved. Antennae 6-jointed ; 6 longest, but not quite 

 so long as 3 -h 4 -I- 5 ; 2 and 4 usually longer than 3 ; all f,c_ ,. 



very variable in relative lengths, so that no formula can be given. 



Male unknown. 



Habitat. — On culms and blades of grass, in the Mesilla Valley, New 

 Mexico. These specimens were collected near the A, & M. College 

 Farm, Sept, ?6, 1897, 



'52. 



"S 



no 



'2S 



'5Z 



/^z 



'0(,^ 



