Hood— New Genera and Species of X. A. Hiysanoptera. 6 r t 



This genua is suggestive of Aptinothrips, Physopus (s. 1.), Oxythrips, 

 and Rhaphidothrips. In it should he placed Thrips binervis Kobus,* a 

 Javanese species differing from venustus in the much slenderer form and 

 tin 1 longer head and prothorax. 



In such genera of the Thripidse as Aptinothrips, Paehythrips, Prosopo- 

 thrips, Apterothrips, Ambly thrips, and Agerothrips the ocelli and wings 

 are always wanting; in Chirothrips and lAmoihrips the ocelli are present 

 in the females hut wanting in the wingless males; in the brachypterous 

 form of the species described by Uzel as Physopus nigrivenlris only the 

 two posterior ones are present; in the type species of the present genus 

 the brachypterous form may have three, two, or no ocelli, while the macrop- 

 terous form always has three. It will thus be seen that the presence of 

 ocelli and wings are not even characters of specific significance and that 

 their use in generic diagnoses can not be considered of any value what- 

 ever. 



Bregmatothrips venustus sp. nov. 

 Plate IV, first figure; Fig. 2, a and b. 



Female: forma brarhyptera. — Length about 1.0 mm. Color dark black- 

 ish brown to black, with pterothorax, first abdominal segment, inter- 

 mediate antennal segments, and legs, yellow, shaded slightly with brown; 

 prothorax slightly paler than head. 



Head about as long as wide, slightly shorter than prothorax; vertex 

 swollen, produced anteriorly, broadly rounded as seen from above; dorsal 

 surface faintly cross striate, armed with three pairs of moderately long 

 slender bristles, the first pair situated opposite center of eyes, the second 

 pair placed almost directly behind the posterior ocelli, and the third pair 

 situated just behind the eyes. Eyes moderate in size, protruding, setose. 

 ( >celli lacking or with the anterior one greatly reduced or wanting. An- 

 tenna? moderately slender, about 1.8 times as long as head; segments 1 

 and 1 brown, the latter paler toward apex and at middle; 3 to 5 pale 

 yellow, sometimes slightly shaded with brown; 6-8 brown, concolorous 

 with head; sense cones pale, slender, simple; formula: o, 0-1; 4,0-1; 

 :>, 1-0; C), 1-1 + 1 . 



Prothorax very slightly broader than long and somewhat longer and 

 wider than head; posterior angles each with two long, slender spines; 

 anterior angles with a pair of smaller, weaker bristles about equal in size 

 to the posterior marginal pair; all other spines small and scarcely visible. 

 Mesothorax slightly wider than prothorax, fore angles broadly rounded ; 

 metathorax closely united to mesothorax and of about equal width 

 throughout; meso- and metathorax uniform pale lemon yellow. Wings 

 short, reaching to first abdominal segment. Legs rather short and stout, 

 yellow in color; femora and bases of tibiae, especially the posterior pair, 

 often shaded with brown. 



Abdomen moderately long, slender, distinctly broader than pterothorax; 



• I nu\ indebted to Mr. A. C. Morgan for the privilege of examining a slide of this 

 species in the collection of the Bureau of Entomology. 



