THK CANADIAN EINTOMOLOGIST. 307 



the postocular, with their bases midway between the anterior ocellus and 

 each posterior one. Eyes moderately large, not prominent, scarcely 

 protruding. Ocelli brownish-yellow, anterior ocellus slightly overhanging ; 

 posterior ocelli contiguous to h'ght inner borders of eyes, their diameter 

 almost three times that of the facets. Antennae eight-segmented; segments 

 3-6 clavate ; 7 and 8 fusiform ; sense-cones long, slender, transparent. 

 Mouth-cone reaching nearly to base of prosternum, short, broadly rounded; 

 labium surpassing labrum by the length of the basal segment of the 

 maxillary palpus. 



Prothorax three fifths as long as width of head, and (including coxje) 

 about three times as wide as long ; surface finely striate ; 

 usual spines all present, slender, pointed, the pair at the \ _ / 

 posterior angles much the longest ; mid-laterals very small. 

 Pterothorax large, rectangular, two-thirds as long as wide. 

 Wings long, reaching about to base of ninth abdommal seg- 

 ment. Anterior femora and tibi« set with a number of long 

 bristles ; anterior tarsus armed with a blunt tooth. \,\f xss 



Abdomen moderately stout, equal in width to pterothorax 

 widest at segment 4, from which it tapers evenly to tube. 



Tube slightly shorter than head, slender, and of nearly equal p „ ^ 



diameter throughout, excepting base, which is slightly spinosus. 

 expanded, and apex, which is slightly constricted ; surface spinose. 



Measurements : Total length, 4.00 mm.; head, length, .64-. 74 mm.; 

 width, .30 mm.; prothorax, length .i8mm , width (including coxae) .56 mm.; 

 pterothorax, width, .67 mm.; abdomen, width, .74 mm.; tube, length 

 .63 mm., width at base .13 mm, at apex .07. Antennae: i, 76/x ; 2, 

 95M; 3. 185/x; 4, i6o/x; 5, 150/x; 6, i2 2/x; 7, 65/x ; 8, 76/x. Total, 

 .83 mm. 



Described from two macropterous females taken at Harrisburg, Pa , 

 March 10, "in burrows of Lepidopterous or Coleopterous larva in dead 

 willow stem." 



Although this species is apparently closely related to J/, bonannii^ 

 Uzel, its generic position is uncertain until the male is known. 



Cryptothrips red angular is ^ sp. nov. (Figs. 18 and 19.) 



Female. — Length about 2.7 mm. Colour nearly uniform black, 

 excepting tarsi and third antennal segment, which are more or less 

 blackish-brown. 



Head rectangular, about one and one-third times as long as wide, 

 sides parallel; literal and dorsal surfaces faintly reticulate, sparsely and 



