690 FAUNA HAWAIIENSIS 



perkinsi or angusticeps, between which species and D. lanaiensis, D. interniedius may 

 be regarded as somewhat intermediate. 

 % unknown. 



The single specimen is unfortunately not a good one, and is not figured as 

 satisfactorily as one would wish. It may, however, be recognized with the aid of these 

 figures. 



Hab. Maui ; one male, Haleakala, 3000 feet, 1900 (Perkins, No. 809). 



(8) Dolerothrips lanaiensis, sp. nov. 



Plate XIX. figs. 10—16. 



$. Length i"8 to 2'o mm., breadth of mesothorax o"4 mm. 



General colour as in D. ovaius, knees in most specimens with a brownish tinge. 

 Antennae with the base of fifth joint yellow, basal third of fourth, and the greater part 

 of third yellowish-brown ; sternum yellowish-brown. 



Head as long as prothorax and seven-eighths as broad as long, sides parallel, 

 roundly constricted at base and set with a few minute spines ; surface transversely 

 striate. Eyes rather large and moderately finely faceted, occupying laterally a little 

 more than one-quarter the length of head ; post-ocular bristles short and slender, set 

 well back. Ocelli small and widely separated, crimson ; posterior pair on a line drawn 

 through posterior third of eyes and touching their inner margins. Mouth-cone as long 

 as its breadth at base, and reaching three-quarters way across the presternum. Antennae 

 slightly more than twice as long as the head ; joints three to five clavate, si.x and seven 

 fusiform and the eighth narrowed from base to a point at tip. A pair of sense-cones on 

 each of the joints three to six. 



Prothorax mildly convex about as long as the head, or slightly longer, and a little 

 more than two-thirds as long as broad ; mid-lateral spines moderately long, posterior- 

 marginal and pair at posterior angles short and weak. Pterothorax as wide as the 

 prothorax and strongly transverse. Wings vestigial. Legs moderately long and stout, 

 fore-femur strongly crassate, smooth, and fore-tarsus armed with a stout tooth. 



Abdomen elongate-ovate, broadest at third segment and narrowing gradually to the 

 seventh segment and thence more strongly to base of tube. Surface very finely 

 sculptured, a narrow band at the posterior margin of each segment smooth ; wing- 

 retaining spines as in D. ovatits but weaker. Tube about three-quarters the length 

 of head, twice as broad at base as at tip and three times as broad at base as long. 



Terminal hairs about three-quarters the length of tube, weak ; abdominal bristles 

 obsolete. 



%. The female is slightly larger and decidedly broader, and has the fore-legs as 

 in the female D. ovat2is. The mouth-cone reaches across the prosternum, the prothorax 

 being decidedly shorter than in the male ; the prothorax is also flat and the prothoracic 



