May, '09] 



ENTOMOLOGICAL NEWS. 



227 



Described from two females taken under the scales of the 

 bark of white oak, Querats alba, August 25, 1908. Readily 

 distinguished from T. dens Moulton by the absence of hypo- 

 dermal pigmentation in head and legs. 



Trichothrips brevicruralis n. sp. (Fig. 7). 



Female. General color of body black, nearly opaque even with strong 

 light. Length of body 1.71 mm. ; width of prothorax .30 mm. ; width of 

 mesothorax .36 mm. ; width of abdomen .50 mm. Length of antennal 

 segments 41 ,,, 52 //, 48 fj., 49 fJ- 46 /x, 41 p., 4i /A, 37 /u,. 



Head very slightly longer than broad ; cheeks somewhat arched behind 

 eyes, rough, some of the prominences bearing anteriorly directed spines; 

 surface reticulate, the cells of the reticulum having their long axis trans- 

 versely placed (visible only in cleared specimens, as are many of the 

 characters mentioned below). Frons roundly emarginate between an- 

 tennae. Postocular bristles rather promi- 

 nent, situated over one-third the length 

 of the cheek behind the eyes. Eyes 

 black, with yellowish brown margins. 

 Ocelli present ; posterior ones almost 

 contiguous with eyes, and located at 

 about the middle of the latter antero- 

 posteriorly, with a small spine behind 

 each ; anterior one almost completely 

 obscured by pigment. Mouth cone blunt 

 and short, reaching but slightly past mid- 

 dle of prosternum ; maxillary palpi two- 

 segmented, the second segment four or 

 five times as long as the first. Antennae 

 S-segmented, 1.6 times as long as head. 

 First segment cylindrical, second barrel- 

 shaped, third to seventh vase-shaped, dis- 

 tinctly but not narrowly stalked ; eighth 

 more or less fusiform, with its widest point two-fifths of its length from the 

 base. First segment black ; second becoming brown toward tip; third 

 yellowish brown, fourth and fifth becoming gradually darker ; sixth to 

 eighth dark brown, except base of the sixth which is paler. The second 

 segment has a circular pale spot above near its tip ; the fourth bears on 

 each side distally a short but quite stout simple sense cone ; the sense 

 cones on the fifth are less conspicuous ; the eighth bears on its dorsal 

 side a row of six spines (exclusive of the apical one) which with three 

 similar spines on the distal third of the seventh segment form a sort of 

 comb. 



Prothorax .83 times as long and 1.5 times as broad as head. One 

 moderately long spine at each posterior angle, a short one at each ante- 

 rior angle ; all blunt, those at the posterior angles being, like most of 



Fig. 7. Trichotkrips bi c-'ici uralis 

 n. sp. Head, prothorax, an- 

 tenna and part of pterothorax. 



