Genera and Species o/Tuhauld-x. 27 



greater breadth of (he imdiun stripe on the dorsum of the 

 abdomen, by the stripe being interrupted (concealed by minute 

 black hairs) on the anterior portion of the second segment, and 

 by the pale border on each side of the dorsum of the abdomen 

 being narrower. 



Jfcad \vllitl^ll-grey pollinose, face, jowls, and basioccipital 

 region clothed with whitish hair; front of moderate breadth, 

 inner margins of eyes bordering it converging sliglitly 

 below ; frontal callus mummy-brown, oblong, longer than 

 broad, and close above it in middle line an upwardly directed, 

 dark brown, elliptical callus, marked with a median groove ; 

 palpi greyish ochraceons-butf, proximal joint clothed with 

 whitish hair, terminal joint viewed Irom side rather broad 

 at base, tapering to a fairly sharp point at distal extremity, 

 clothed above and on outer side with minute, shining, 

 whitish or yelloM'ish-wliite hairs, interspersed with minute 

 black hairs; first and second joints oi antenna ochraceons- 

 buff (third joint missing in ease of type). Thorax as in 

 T. luverani, Surcouf (dorsum seal-brown, thinly clothed with 

 greyish pollen, and with sides and two broad admedian 

 stri[)es, commencing on front margin and meeting at tip of 

 scutellum, grey pollinose and clothed with pale yellowish 

 or whitish hair ; pleurae and pectus grey, clothed with 

 whitish hair). Abdomen: dorsum chestnut-brown, darker 

 on fourth and following segments, with a whitish-grey 

 ])ollinose median stripe, which extends from base of first 

 to hind margin of fifth segment, and on third and two 

 following segments is composed of a series of truncate 

 triangles, each of which has its base resting on the hind 

 margin of its segment, and its forwardly directed apex cut 

 off by the hind margin of the preceding segment ; the 

 triangles on the third and fourth segments are rather broad, 

 and their bases approximately equal in length, Avhile the 

 base of the triangle on the fifth segment is conspicuously 

 shorter, so that on that segment the stripe appears to be 

 suddenly narrowed ; on second segment, where stripe is 

 constricted in middle and, except at extreme base and on 

 distal half, concealed by minute black hairs, stripe is much 

 narrower than on distal halves of two following segments ; 

 on first segment base of stripe takes the shape of a median 

 blotch, which, anteriorly as broad as scutellum, tapers to 

 hirul margin ; except where covered on second segment with 

 minute black hairs, the stripe is clothed with minute, 

 appressed, pale yellowish hairs (on hind margin of first 

 segment in middle line the pale yellowish hairs are some- 

 what longer) ; sixth segment with a very narrow, almost 



