TYLOSIS.—CROSSIDIUS. 81 
TYLOSIS. 
Tylosis, Leconte, Journ. Ac. Phil. ser. 2, i. p. 9 (1850). 
Three species are known, from Mexico and the region of North America immediately 
adjoining. 
1. Tylosis maculata. 
Tylosis maculatus, Leconte, loc. cit. p. 9; Col. of Kansas and Eastern New Mexico, p. 20, t. 2. 
f.15}. 
Hab. Nortu America, New Mexico 1.—Mexico (Sallé). 
Mexican specimens differ constantly from Leconte’s figure above cited, in the central 
black spot of the elytra being oblique instead of transverse, and in the scutellar spot 
forming a large black patch surrounding the scutellum ; in both the humeral spot is 
sometimes wanting. 
2. Tylosis oculata. 
Tylosis oculatus, Leconte, loc. cit. p. 9°. 
Hab. Mexico }. 
8. Tylosis sellata. 
Tylosis sellatus, Leconte, Journ. Ac. Phil. iv. 1, 1858, p. 257. 
Hab. Norra America, Texas.—MeExico, Sonora. 
I have received a specimen of this distinct species in a collection said to have been 
made in Sonora. 
CROSSIDIUS. 
Crossidius, Leconte, Journ. Acad. Phil. ser. 2, ii. p. 102 (1850) ; Smithson. Misc. Coll. no, 264, 
pt. u. p. 196. 
Of similar form to Tylosis, but without the supplementary (12th) antennal joint 
which distinguishes that genus. The species, as a rule, are remarkable for their dense 
and somewhat long pubescence. Like Tylosis and many nearly allied genera it is 
restricted to the southern and western regions of North America, including the 
northern parts of Mexico. Eight species have been described from the United States. 
1. Crossidius palmeri. 
Elongatus, fere cylindricus, niger, griseo-hirtus ; elytris fulvis vel rufis, margine basali macula elongata, 
vittaque suturali, apice subito dilatata, nigris ; thorace ¢ subglobuloso, grosse et crebre punctato, inter- 
dum rufo-maculato, 9 angustiore sparsius punctato linea dorsali levi; subtus abdomine fulvo, basi plus 
minusve nigro. 
Long. 53-6 lin. ¢ Q. 
Hab. Mexico, Alvarez Mountains (Dr. Palmer). 
The elytra are marked almost the same as in Cr. discoideus (Say); 4. e. the sutural 
BIOL. CENT.-AMER., Coleopt., Vol. V., June 1880. m 
