40. 
41. 
42. 
43. 
44, 
46. 
48. 
ENTOMOLOGY 911 
Wing completely hyaline, the stigma barely indicated. Dorsum of thorax with distinct, 
longitudinal, white bands in the anterior half (stopping abruptly at the transverse 
suture) and a posterior, broad, white cross-band; scutellum dark gray. Length, 
Te eval Crean eae ie, ee NN Oe eR et evi UR ld Peddie aoae gute 3 T. sharpet. 
Wing slightly clouded, with distinct, brownish stigma...............0..000000eeeeee 41. 
Thoracic dorsum rather uniformly cinereous gray anteriorly (as far as the transverse 
suture), without distinct longitudinal stripes; hind margin of dorsum and basal half 
of scutellum white; apical half of scutellum dark. Median spots of abdomen low, 
transverse, half-moon-shaped. Length, 11.6 mm.................... T. argenteus. 
Thoracic dorsum with two more or less distinct, median, longitudinal stripes in front of 
the transverse suture; hind margin of dorsum and entire scutellum white. Median 
spots of third and fourth tergites higher, extending to or close to the anterior 
Patou emma. Wk torlecy MMM. rsie ss toad ane Rivia rd Py ed eeaee T. wellmanti. 
Median white spots of the abdomen large and restricted to the third and fourth tergites; 
in addition, the first five tergites with lateral, white, rectangular triangles, squarely 
cut off on the inner side. Dorsum of thorax anteriorly with two white, longitudinal 
stripes, stopping at the transverse suture; its hind margin and the scutellum also 
white. Legs black, the tibiae mostly white. Fore tarsi not expanded. Wing 
WigeLMes Hemme hl COMMeMMLIS Aas. ne ula s Yu. 4 oe du rcmeee idle Ree Re aad T. dwersus. 
Median white markings, if present on the abdomen, not restricted to a spot on the third 
peMOr Me MCR eMUChy Ata ra ati eae. Oh aye ne pls sabe cools ee Mee a OR ah Fee pO EN 43. 
Abdomen reddish, with a black median stripe from the first tergite to near the apex, its 
borders not very clearly defined. Antennae reddish. Frons about five times as long 
as wide, parallel-sided; the basal callus nearly square, continued as a broad stripe 
nearly to the vertex. Legs reddish yellow, the fore femora brown, the tibiae pale 
yellow with white pubescence; fore tarsi and apex of fore tibiae brown. Wing clear, 
pale yellow on the extreme outer border, the veins and stigma yellowish, with a 
short but stout appendix to the fork of the third longitudinal vein. Length, 12 mm. 
JE Pe A I SNORE ae ee eR OA ee ne T. obscurestriatus. 
Abdomen not brownish red with a median black stripe.............0..c000ceceveeese 44. 
First and second abdominal tergites mostly white pruinose and covered with white pile; 
the second with an anterior, median, dark brown spot deeply incised by a white 
median triangle on the hind margin; the anterior corners of the second tergite also 
more or less brownish. Remaining tergites with narrow, white hind margins, 
raised more or jess in the middle of each tergite; sometimes also with lateral, discal, 
pease icine eee tena er nee: Se cs WN Aen as iu pL RS? auntie has era “craln Shai hao Slee nse Wie 45. 
First and second tergites not mostly white as contrasted with the remainder of the 
LAS GD (S11 een ACA Seid SRE Rly ee ar oar ACA OME p08 SE a. Fae OPUS eg 46. 
. Wing hyaline. Triangular, median, pale spots of third to sixth tergites large, almost or 
quite reaching the anterior margins; the tergites with distinct lateral, discal, pale 
spot. « Val dirty white. Ibemethiy 08 Mittin... oe) ite ves haw secs T. atrimanus. 
Wing slightly smoky along the anterior margin. Triangular, median, pale spots of third 
to sixth tergites very faint; the lateral, discal spots more or less distinct. Palpi 
DEMIS. Wench, OGOr Lol. ics. daub ae dds a cs nae G elew en wa ys T. variabilis. 
Wing infuscated, with clearer blotches in the center of most of the cells, darker along the 
anterior margin before the apex. (See above).................... T. obscurefumatus. 
Wing not infuscated with clearer areas in most of the cells.....................00058. 47. 
7. Abdomen dorsally with a practically continuous and regular, bright white or grayish 
white, longitudinal, median stripe, which is not or hardly broken by the hind margins 
of the tergites. Wing hyaline or nearly so, with yellow or brownish stigma....... 48. 
Abdomen with the median stripe broken by the hind margins of the tergites so as 
to form triangular or trapezoidal spots, or with a median row of spots, sometimes 
Pian ili elogyigualey (2112 Cee Ra te mea as OW BPEL aan KC ar 50. 
Abdomen dorsally reddish brown, only with a median, well-defined, longitudinal, white 
stripe and the extreme side margins pale; no lateral stripes or rows of spots. 
Antennae entirely reddish. Dorsum of thorax with two well-defined, broad, median 
longitudinal, pale stripes. Frons three to four times as long as wide, with a large 
basal callus connected with a very large median callus. Length, 10.5 to 12 mm. 
eet iy ne ne Ses VR REC ee aCe Sys wad aes T. laverani. 
