282 ACADEMY OF NATURAL SCIENCES 



It is also very destructive to Iris root of the shops, and to various 

 other farinaceous substances. It has some resemblance to the A. 

 striatum Fabr., of Europe, but the terminal joints of the antennae 

 are less elongated, the thorax is less contracted before, and the 

 striae of the elytra are much narrower. The name given by Mr. 

 Melsheimer is pre-occupied. [174] 



TILLUS Fabr. Latr. 



1. T. BICOLOR. — Black ; thorax rufous, anterior and posterior 

 margins black. 



Body hairy : head black : antennae dusky, pale rufous at base : 

 mouth pale rufous : thorax contracted behind the middle, and a 

 little dilated at the middle : rufous, anterior and posterior mar- 

 gins black : elyti-a black, with regular striae of punctures : pectus 

 rufous, anterior and posterior margins black : postpectus piceous : 

 feet yellowish, knees and tarsi dusky. 



Length more than three-tenths of an inch. 



Resembles T. elongatus Linn., of Europe, but the middle of the 

 pectus is not black, and the anterior and posterior margins of the 

 thorax are black. Mr. Nuttall brought me a specimen of this 

 insect from Arkansa, and Dr. J. F. Melsheimer sent me one 

 under the name which I have adopted. 



[This is a Cymatodera. — Lec] 



2. T. UNDULATUS. — Elytra pale testaceous, two undulated 

 bands and tip black. 



Notoxus undvlatus Melsh. Catal. 



Body long, slender : head black : eyes nearly entire : antennae 

 pale rufous, nearly filiform, slightly larger towards the tip, and 

 hardly serrated : palpi pale rufous : thorax blackish, cylindrical, 

 transversely indented on the anterior submargin, a little dilated 

 on the middle of the lateral margin, and narrower behind : elytra 

 with regular striae of punctures, pale testaceous ; basal margin 

 blackish ; an undulated band before the middle, another behind, 

 the middle and tip black: [175] beneath rufous, stethidium 

 sometimes varied with blackish : feet pale testaceous ; nails pec- 

 tinated. 



Length nearly two-fifths of an inch. 



This insect has the habit of a Notoxus, but it cannot be con- 



[Vol. V. 



