258 SMITHSONIAN MISCELLANEOUS COLLECTIONS __ [voL. 48 
formed the basis for Mr. Coquillett’s diagnosis of M. violaceus and 
we have characterized the larva under that name. 
It is evident that the three male specimens reported from Atoyac 
in the state of Vera Cruz (Mexico) by Williston, and doubtfully 
referred by him to hemorrhoidalis, belong to the present species. 
His criticism of Wiedemann’s description of hemorrhoidalis and his 
statement that the red hairs of the tuft “are confined to the tip of 
the sixth and the sides of the seventh segments ” proves this beyond 
a doubt. 
The following list comprises the American species of Megarhin- 
inz described up to the present: 
Genus ANKYLORHYNCHUS Lutz 
VAOLACEUSHE WW tedemmantia te 55 5)G ee sarod caeersncnsicke whe Sectors esr eh roa mente Brazil. 
?purpureus Theobald. 
trichepyvas Wiedman 4... 0.22. nee nen ee errr es rey oe es PC Brazil. 
MESlECh us itz ages Sele tc ees Ginnie akan oake CIS OL She Ce eee ee btazile 
Genus MEGARHINUS Robineau-Desvoidy 
septentrionalis, Dyat.and Knalhs /22).4. 25295408052 ssa cess oe Atlantic States. 
ferox Walker (not Wiedemann). 
rutila Coquillett (in part). 
‘portoricensis Coquillett (not von Réder). 
Sutil, CoOaaillettees .Mepeyses cs ie ac ce hewe Bag crete Bode sue he) ersoee Seay Pro ee ere Florida. 
haitiensis’ (yar mndeieaa by: 0 Nor Pe eee et oe ae ee Ae Santo Domingo. 
DUTLOLICHISIS) VO ROGEE ce x 6)id ia 2,00) 5 A.<, da dyed win aldo ae ae Porto Rico. 
guadeloupensiss Dvatcand) IKnalb:~ sais, cms cc cies > a ciectkeje ieee euenre Guadeloupe. 
violaceus & Coquillett (not Wiedemann). 
Species ee ah. Be cats a erat one © ayers Bi ST aH i GG 8 eRe St. Vincent. 
portoricensis Williston (not von Réder). . 
trinidadensis: Dyar sand. Kab co... oa a lel mee oes ek eae Trinidad 
longines eBlicowatd: as... 5 Gel ce ysl bon eae es ge ge else Bae See ee Mexico. 
SEPHAIGNA AW UN S1OM He 3 Sawa iwc sp veep Sp ahs eayaihh sels ae pe ee Mexico. 
moctezumia Dyat andi Kuab. . 2.14 fA eee. Seek oe Central America. 
Pspecies Osten Sacken.* p 
SUpEthUS, yar athena. fb oie le ey rahe ce memes Mexico, Trinidad. 
hemorrhoidalis Williston (not Fabricius). 
violaceus Dyar and Knab (not Wiedemann). 
violaceus 2 Coquillett (not Wiedemann). 
Vhzemorrhordalis Hapniciiss 2). = ors, oveter a cvecese teats e eiere cre coal crerayer te oeaionenetomelne Guiana. 
separata Lynch-Arribalzaga. 
theobaldit. yar and. Kina « sf .66.0sc.2 guts ae eel oe ee ame eee ees Brazil. 
ferox Theobald (not Wiedemann). 
wiedemannt Dyar and Kanab . cis) crdiete nw scanned a5 4 aes see eee Brazil. 
ferox Wiedemann (not von Humboldt). 
ambiguus Oyatvand Frab: 5 sca s chovk aku ane te os eto an olathe @ atoatele ene Brazil. 
ferox Wiedemann (not Wiedemann). t 
Maria: | Boureoml hi. peas be 5 oe seme ae as SO ee ahs staianchtienser tee the eens Brazil. 
solstitights Mate yt. oe .tcse.. 5 js taiaee eee cis in ger 8 eR ee Brazil. 
lynchi Dyar and Knab ..... Trinvaug le cetejeld alegre a's kip & epee eae te Rene Argentine. 
hemorrhoidalis Lynch-Arribalzaga (not Fabricius). 
* Biologia Centrali-Americana, Diptera, v1, p. 6 (1886). 
