THE SIAMESE GRAIN BEETLE. TS 
S. C., sent’ specimens of this species, and in a letter of August 22 
reported that millers in that vicinity had some years previously 
received rice from Siam and other points in the Orient as well as from 
Honduras. 
It was reported, October 20, 1906, from El Rancho, Guatemala, by 
Mr. E. E. Knight, who furnished living specimens, as injuring grain, 
together with the so-called corn weevil (Calandra oryza L.). Living 
examples also occurred among some infested black beans. 
During 1909 the species came under observation on several occa- 
sions, especially in different localities in Texas, the records being 
furnished chiefly by Mr. D. K. McMillan. June 26 of that year 
specimens were obtained in various materials from a flour mill in 
Galveston. June 28, Mr. J. G. Sanders, then of this bureau, found 
adults in eggplant and gourd seeds, and beans from Siam. Of its 
occurrence at Brownsville, Tex., Mr. McMillan wrote that the beetles 
were very abundant in old rye from the bottom of a bin, and that they 
were scattered throughout the mill inspected. He observed that they 
were much more sluggish than most mill insects, and clung closely to 
the flour sacks and to wood and paper upon which they were resting. 
They also have the habit of accumulating, or crowding, into small 
groups, thus showing the gregarious habit common to most herbivo- 
rous insects found in stored material. At one mill it was the most 
abundant species found among rubbish. October 25, Mr. F. A. 
Stockdale sent this species in paddy rice imported from India and 
traced to Georgetown, Demerara. December 6, Mr. McMillan sent 
specimens from Houston, Tex., where the insect occurred in rough 
Japan rice. At New Braunfels, Tex., it occurred in old rye, flour, 
and rubbish. 
DESCRIPTION. 
THE ADULT. 
The genus Lophocateres was characterized in 1883 by Olliff, who 
referred it to the subfamily Peltini of the family Trogositide, a group 
which includes the well-known genera Peltis and Calitys, beetles 
having flattened, more or less oval, bodies with much flattened 
thoracic and elytral margins. Olliff’s description is as follows: 
Genus LOPHOCATERES Olliff. 
Head nearly quadrate. Eyes rather small, lateral, not prominent. Antenne 
11-jointed, basal joint large, with the inner angle much produced, 2nd joint short, 3rd 
rather longer, 4th to 7th transverse-and very short, last four forming a gradually elon- 
gated club, of which the joints increase in breadth as they approach the apex. Mandi- 
bles robust, inner margin straight, the apex slightly incurved. Maxille with both lobes 
narrow and sharply jointed, the inner much the shorter. Maxillary palpi 3-jointed, 
the basal very small, the 2nd rather longer, the 3rd longer than the Ist and 2nd together, 
rounded at the apex. Labium with the anterior margin rounded. Labial palpi 
2-jointed, of which the apical is somewhat the longer. Prothorax transversely quad- 
