THE CANADIAN F.NTOMOLOdlST. 155 



an*d 4 irregular, ovate, with an elongated papilla extending from the outer 

 anterior portion ; joints 5 and 6 slightly smaller, 7 and 8 minute ; in some 

 cases traces of a ninth joint can be seen : joints 5-8 are more hairy than 

 the others : 3-6 dilated ; ocelli placed far back on the vertex ; prothorax 

 converging rapidly to the anterior border, where it is equal in width to the 

 occiput, broader at posterior border than long : a few spines at posterior 

 angles. In front of mesothorax, forming a girdle, is a narrow thickened 

 portion, which at the sides, with an amplification of 150 diameters, is seen 

 to be thickly set witli \ery short pointed spurs ; mesothorax short and 

 broad ; metathorax slightly narrower : legs nearly equal, anterior ones a 

 little more robust and with few scattered hairs, intermediate and posterior 

 ones more hairy and with tibia; on distal portion, and the tarsi, spiny. 

 Wings slender, sword-shaped, anterior pair smoky, with two longitudinal 

 veins, costal fringe not more than half as long as inner, beginning near 

 the base with strong spines, a few spines situated on the \eins ; posterior 

 wings hyaline, a thickened line (vein ?) along the middle. Both wings 

 with minute short hairs scattered over the membrane : abdomen tapers 

 suddenly after seventh segment, a few hairs on anterior segments, becom- 

 ing longer and more numerous caudad. 



Collected at Manchester, Delaware Co., Iowa, where it was very abun- 

 dant in heads of timothy grass. July 10th, 12th, 1882. 



Thrips striata, n. sp. 



Female. Length 1.15 m.m. Width .25 m.m. Whitish with yellow 

 and blackish markings. 



Head rounded in front, appears marked with transverse stride and dusky 

 border posteriorly; antennae approximate, whitish at base, gradually 

 becoming more dusky toward the apex, where they are nearly black. Eyes 

 large ; ocelli near together and well up on vertex. Thorax with elongated 

 dusky patches forming a broken subdorsal stripe each side ; on the pro- 

 thorax these extend latero-cephalad and are broken into spots ; abdominal 

 segments 1-6 are dusky on tergum, except at the sides-, seventh has dusky 

 spot in centre, apex slightly dusky and surrounded with black spines ; 

 thorax and abdomen tinged with yellow at the sides. Hairs scarce and 

 fine, except at end of abdomen. Legs concolorous with body, with dusky 

 patches on dorsal aspect of femora and tibia;, sparsely set with fine hairs. 

 Wings unmarked, fringe and spines wanting at base of costal border, no 

 discal spines ; both wings covered with very minute hairs. 



