136 THE CANADIAN ENTOMOLOGIST. 



Eriopfiltis Coloradensis, n. sp. — $ . Dark brown (colourless after 

 boiling in liquor potassae), forming a pure white ovisac lo to 12 mm. long, 

 of the form usual in the genus, compact, without any conspicuous 

 filaments extending from its surface ; antennae and legs very minute ; 

 antennse 8-jointed, joints i and 3 large but variable, 2 always very short, 

 more than twice as broad as long, 4 to 7 all broader than long, 8 with 

 several bristles ; skin with truncate glandular spines as in E. festucce^ but 

 they are not nearly so numerous, and seem generally shorter ; anal plates 

 much longer than broad. Length of mounted $ about 6 mm., breadth 

 about 3. 



On stems of grass, Boulder, Colorado, November, 1904. The exact 

 locality of this and the Triojiyvius is the meadow in front of 930, 14th 

 street. 



Triotiymus nafms, n. sp. — 9 . Very minute, elongated and rather 

 parallel-sided, hardly i^^ mm. long, and about three-fifths mm. broad; 

 very pale yellowish, antennte and legs very light reddish, antennae not 

 extremely close together ; secretion yellowish. Antennae 7-jointed ; tibia 

 a little longer than tarsus. In potash the females turn light yellow. 



Under a rock, presumably feeding on the underground parts of grass, 

 Boulder, Colorado, Nov., 1904. Three found by W. P. Cockerell. The 

 specimens evidently represent the early adult ; after the eggs are formed 

 they will no doubt be larger. 



Orthezia olivacea, w. s,^. — $. Length about 2}^ mm., with cauda 

 rather over 3 mm.; legs and antennae reddish-brown. Body entirely covered 

 with dense white secretion ; dorsal line marked by a deep groove, with 

 no median tufts ; the two dorsal rows of lamellae thick and obtuse, the 

 first pair overlapping head, but not projecting far forwards : area between 

 dorsal and lateral lamellae covered by secretion ; lateral lamellae broad, 

 the anterior three truncate, the others more pointed, the points curved 

 inwards ; caudal lamellae surpassing last lateral ones, but not very long. 

 Body denuded of lamellae dark olivaceous. Antennae (so far as seen) 

 7 jointed, joints i, 2 and 3 subequal, but 2 the shorter; 4, 5, 6 shorter and 

 subequal, but 5 somewhat the longer; 7 about as Icmg as 4 + 5-1-6. 

 Immature forms similar in appearance, but antennae and legs rather light 

 reddish, last joint of antennae conspicuously darkened. 



Boulder, Colorado, in nests of Lastus under rocks, Nov., 1904 (W. 

 P. and T. D. A. Ckll.). Also found formerly in nests oi Lasius at Trout 

 Spring, New Mexico, April 27. The following measurements in /a are 

 from the Trout Spring material : Antennal joints : (i) 96, (2) 78, (3) 90, 

 (4) 48, (5) 48, (6) 39, (7) 129; knife-blade-like spine on the end of last 

 joint 18 long ; middle leg, tibia 225, tarsus (excluding claw) 195. Easily 

 known from O. lasiorum by the colour of the body and the absence of the 

 long tail in the immature forms. 



