586 FAUNA HAWAIIENSIS 



(2) Species usually brown of various shades or dull black or dark fuscous, the tomentum always scanty 

 so that the sculpture of the insect is easily seen in dorsal aspect, form elongate, numerous 

 evident punctures can be seen on the striae, second stria always confluent with the third alone at 

 the apex, where they are very distinctly impressed. Pronotum seen in profile with its outline 

 straight or hardly curved or convex X. griinshawi and dollfusi. 



(3) Species with elongate or very elongate antennae in the (?, the several joints before the apical one 

 all strongly elongate and usually very slender. 



(a) Species large or at least robust, never with yellow elytral spots or fasciae, the elytral striae 

 distinct to the apex, the second confluent with the third only (as a very rare variety the second 

 and third free at apex) X marmorattis, meyrkkii. 



{b) Species not striate as in {a), the pronotum anteriorly strongly margined throughout, the margin 

 usually shining X. protetis, mesocklonis, iii/pfus, pek, euceras, tnimus, snbmimiis, affiiiis Sh. {?). 



(c) Species not striate as in ia), sometimes yellow marked, the pronotum indistinctly or feebly 



margined in the middle in front; eyes of $ of the usual size X. oculatus, suboculatus, 



carpenter!, ashmeadi, blackburni, heddardi, forelli, britntieri. 



{d) Species as in (<■), but the eyes of the $ abnormally large, the width of the two together at least 



subequal to that of the space between them, or sometimes much larger still X. megalops, 



euops, insignis, kirkaldyi. 



(4) Species with short antennae in both sexes, the several joints before the apical one not strongly 

 elongate in the $ and never very slender. 



(a) Dark markings of elytra so disposed as to make a pattern of several alternate light and dark 

 transverse bands or the elytra are dark with a very conspicuous transverse pale mark on the 



apical declivous portion ; the interstices apically near the suture strongly convex A', euphorbiae, 



cyphus, ino/ias. 



(b) Elytra with a great brown or golden subtriangular spot of tomentum, extending to the shoulders 

 at the base, and with its apex beyond the middle of the suture X. collingei, speiseri. 



(c) Pronotum with two conspicuous round spots of pale tomentum X. sharpi. 



(d) Elytra with conspicuous yellow spots or bands X. shiwni, fraternus, roridus. 



(e) Pronotum in dorsal aspect with the front margin laterally a little prominent (before the deflexed 

 front angles) or rarely angulate or subangulate ; not simply rounded ; species mostly very small 

 and narrow X. sykesii, praeeeps, iiuntdiis, aui-ifer, chryseis, flosculiis. 



if) Pronotum in dorsal aspect with the front margin simply rounded at the sides, not slightly 



prominently rounded, or subangulate A', scotti, stebbingi, lineatus, serratus ^\. {^), lasiodes, 



sulcatus. 



Although in the second part of this table the males alone are actually dealt with, 

 yet in nearly all cases the characters used are also equally applicable to the females. 

 The latter sex, in the sections wherein the males have strongly elongate anteapical 

 antennal joints, also generally has these too slender and elongate to be confused with 

 the males in the other group, having short antennae. Only in two or three cases do 

 the females, that belong to males with long antennae, have these organs with the joints 

 so shortened as to be similar to those males that have the antennae most developed in 

 the other section. . Xyletobitis akuritis is not included in the table, as I doubt whether 

 it really belongs to the genus. 



