MESOLASIA; TRICHURA. By Dr. M. Draudt. 
Ill 
are ochreous-yellow as well as a middle line on the metathorax, being continued on the 2 or 3 first abdominal 
rings as triangular dorsal spots. Underneath, the otherwise black abdomen is curled orange-yellow; the lateral 
hairing and the underside of the anal tuft, being black above, is carmine. Antennae, palpi and legs are black, 
the inner side of the hips and femora striped ochreous yellow. The basal parts of the hyaline wings are ochreous 
yellow, carmine are stripes at the base of the costal margin, the median and along the proximal margin as far 
as near the anal angle. The margins of the forewings are narrowly, those of the hindwings broadly bordered 
with black. Described according to 2 <$<$ from Colombia; type in Coll. Draudt. 
62. Genus: Mesolasia Hmps. 
Large, robust species, the exterior of which reminds us of Homoeocera- species, from which, however, they 
are easily discernible by the uncommonly large cell of the hindwing. Like there, the antennae are greatly 
thickened in the middle and exhibit, here on the upper side a thick cover of hair. The upper median vein and 
both the lover radial veins of the hindwing rise all separately, the uppermost radial vein a little below the 
upper cell-angle. 
M. haemorrhoidalis Stoll (haemorrhusa Hbn.) (18 c) is a very large, characteristic species easily recogni- haemcrrhoi- 
zable by the carmine first and the 4 last abdominal rings. Occurring from British Honduras to Brazil (Rio de 
Janeiro). 
M. paula Schaus (18 d) differs from the preceding by only the 3 last segments of the black abdomen paula. 
being red. From the exteriorly very similar Homoeocera lophocera Druce it is easily discernible by the difference 
of the veins on the hindwings: Homoeocera has a very minute, Mesolasia an uncommonly large cliscocellular. 
Brazil (Sao Paulo). 
M. felderi Rothsch. (18 d) differs from the preceding species by its smaller size, a more graceful structure, felderi. 
and very much narrower black margins of the wings; the narrow, black discal spot only extends as far as the 
rise of the 1st median vein. From French Guiana and Brazil. 
M. hampsoni Dogn. is black on the front body and the 5 first abdominal rings, the other rings are hampsoni. 
carmine, the anal tuft yellow. Wings like in the preceding, but with a larger apical spot of the forewing. Expanse 
of wings: 40 to 43 mm. Venezuela (Merida). 
M. melanobasis Druce (18 d) is well characterized by the apical hyaline spots in the very broad marginal melano- 
band of the hindwing. The black abdomen with 3 red terminal segments exhibits on the first ring a large dorsal 
spot, on the others small white ones. Brazil (Sao Paulo, Sa. Catharina, Parana). 
M. ornata Men. (18 e). Head, thorax and the 3 first abdominal rings black; the anterior side of the ornata. 
palpi, the margins of the shoulder-covers and spots on the collar and the black abdominal rings are white. 
Beginning from the 4th ring, the abdomen is carmine with dorsal black, white-pupilled spots. On the ventral 
side two rows of white spots. Wings hyaline with black veins and margins, middle spot and apical spot; the 
proximal margins of all the wings striped yellow. Expanse of wings: 42 mm. Brazil (Minas Geraes). 
63. Genus: Triclmra 
A very characteristic genus, looking very much like Ichneumonids owing to the strangulated abdomen; 
in order to increase this impression, in single species the <$<$ exhibit at the abdominal end a long, terebrae-like 
appendage consisting of soft hair and densely covered with scales. The hyaline wings are distinguished by the 
extraordinarily long cell of the hindwing, so that the transverse vein disappears in the black marginal band. 
All the veins rise separately. The shaft of the antennae is thickened in the middle and above covered with 
rough, hairy scales. Hampson’s division of the species into such with, and such without an abdominal appendage 
is not maintainable, as in many species, such as dixanthia, monstrabilis etc., the $<$ sometimes occur with the 
appendage, sometimes without it. 
T. cerberus Pall. (= caudata F., urophora H.-Schdff.) (18 d) has yellowish hyaline forewings with cerberus. 
narrow black margins and a discoidal spot varying greatly in extent . The velvety-black abdomen with metallic 
bluish-green spots and bands has underneath a large, white basal spot and sublateral white macular rows. 
Widely distributed in Venezuela, Surinam, Brazil (Amazon, Rio de Janeiro, Sao Paulo) and Trinidad. — Speci¬ 
mens with particularly narrow black margins and discoidal spots, as they are before me from Bolivia from 
the Rio Songo, have been denominated: angusta Stgr. (i. 1.?) (18 d). — This species exhibits the longest tail- angu&ta. 
appendage which may even grow longer than the whole body. 
