June-Oct., 1921 Bulletin of the Brooklyn Entomological Society 83 



Watson, J. R., '18. New Thysanoptera from Florida — IV. 

 Florida Buggist, Vol. II, No. 3. 



Cryptothrips adirondacks n. sp. 



Body color uniform dark brown, almost black, tarsi and 

 antennae lighter brown. Measurements: Total body length 

 2.25 mm. (2.00 to 2.5 mm.) ; head — length 0.28 mm., breadth 

 0.19 mm.; prothorax— length 0.14 mm., breadth 0.33; abdo- 

 men — greatest breadth 0.41 mm.; tube — length 0.24 mm., 

 width at base 0.08 mm., at apex 0.04 mm. Antennae — total 

 length 0.45 mm.; segment i, 44; 2, 52; 3, 82 {72 to 94) ; A, 

 85 (81 to 90) ; 5, 72 (62 to 82) ; 6, 63 (53 to 73) ; 7> 55; 

 8, 35 microns. 



Head 1.5 times as long as wide; cheeks slightly arched, 

 quite markedly constricted posteriorly, bearing a few short 

 sparse hairs; dorsal surface striated; vertex swollen into a 

 prominent rounded protuberance which occupies the entire 

 space between the eyes and bears the anterior ocellus at the 

 apex; post-ocular bristles about as long as the eyes, dilated 

 into a small colorless head ; eyes large, protruding, not pro- 

 duced on the ventral side, occupying nearly a third the length 

 of the head, dark brown, anterior half of the inner margm 

 nearly straight ; ocelli large, posterior pair situated well for- 

 ward, opposite the anterior ]/[ of the eye whose margins they 

 do not touch ; mouth cone rather long, reaching two-thirds 

 the distance across the prosternum; antennae 1.5 times the 

 length of the head ; segment i dark brown ; 2, lighter ; 3 and 

 4 yellow; remainder light yellowish brown, darker apically. 

 Prothorax small, length only about half that of the head ; 

 breadth, inctuding coxae, about equal to the length of the 

 head ; surface reticulated ; posterior angles well rounded and 

 bearing each a single, medium heavy spine whose end_ is 

 dilated into an inconspicuous knob; somewhat longer spme 

 on each coxa ; legs rather slender, almost as dark as the body ; 

 tarsi a lighter brown; fore femora but little enlarged and 

 fore tarsi unarmed. 



Ptero thorax considerably wider than the prothorax ; w^ngs 

 rather weak, membrane clear except at the extreme base, con- 

 stricted in the middle, fringing hairs long, 5 to 14 interlocated 

 ones. 



Abdomen long and slender. 

 Male similar to the female, but smaller. 

 Larvae very long and slender; black with reddish hypo- 

 dermal pigmentation. 



