SOME THYSANOPTERA OF MEXICO AND THE SOUTH I 



D. [,. CRAWFORD. 



Aeolothrips vespiforniis n. sp. 



Length of body 1.6 mm.; general color dark brown, with first two and 

 part of third abdominal segments light. 



Head (Fig. 49 A) broader, posteriorly, than long, rounded uniformly 

 from prothorax to insertion of antennae ; distinctly retracted into prothorax ; a 

 notched projection between insertion of antennae ; two spines on each side near 

 posterior margin, and one near basal antennal segment ; head giving a general 

 hemispherical appearance. Eyes large, extending far under onto ventral side 

 of head, coarsely facetted, not pilose. Ocelli present, large, conspicuous, mark- 

 ing an equilateral triangle between eyes. Mouth cone long, bluntly rounded ; 

 maxillary palpi three-seginented. Antennae lost, one basal segment, only, 

 ])resent ; inserted very close to each other. 



Prothorax (Fig. 49 A) longer and broader than head, broader anteriorly 

 than posteriorly, and broader than long ; sides roundly tapering posteriorly^ 

 with two mid-lateral spines and no others ; head and prothorax at first sight, 

 appear as a large elongate head, so closely are they united. Mesothorax 

 narrowest at attachment to prothorax, diverging so that midlaterally it is a 

 little wider than prothorax ; sides converging to posterior margin of nieta 

 thorax. Legs ( Fig. 49 D ) long, clothed with conspicuous spines ; posterior 

 tibije with a stout spine at tip ; posterior tarsi long, second joint with numerous 

 microscopic hairs. Wings (Fig. 49 C) moderately long, reaching a little 

 beyond posterior margin of seventh abdominal segment ; broadly rounded at 

 tip; no cross veins present, but about one-third the wing's length from the 

 tip the anterior longitudinal and ring vein bulge out and apparently unite ; 

 with a small clear area near base and another almost at the tip. and a larger 

 clear area near center, occupying nearly one-fourth the wing's Icngtli and 

 almost the entire width ; eight siMnes on anterior longitudinal vein between 

 base and central clear area, none on clear area, and seven beyond clear area ; 

 on posterior longitudinal vein, one spine between base and central clear area, 

 four on clear area — two on proximal and two on distal portion. — and nine 

 beyond clear area ; a row of twenty-two spines on anterior margin, beginning 

 at base of central clear area ; ])osterior margin with long simple fringe ; wings 

 light brown, except above mentioned clear areas. Posterior wings almost 

 clear, margins light brown ; with long fringe on both margins. 



Abdomen (Fig. 49 H) very narrow at attachment to thorax, subpetiolate, 

 diverging to fully one and one-half the width of mesothorax ; widest at sixth 

 segment, converging abruptly to tip; third to fifth with one short spine on 



