89 



wliicli when compared with T. Umbatus Fabr., of Europe, sent 

 me by you, offer no differences which I can perceive. 



I beheve our Oicindela denticulata is the same Avith C. rugi- 

 frons Dejean,!, 53. It is true the labrum in all the 9 obse^|ved 

 is blackisli, but that is very often the case with the $ of Q. 

 unipunctata, splendlda^ hirticollis (rejjanda Dejean) and my 

 1125 (probably C. rufiventris Dejean, which I suppose to be 

 a variety of C. hcemorrJioidalis^. ISTow he may have a speci- 

 men where the labrum has not changed its color. 



Your 582 which you labelled JBrachinus cordicoUis, I num- 

 bered 112() [== ^'■Brachinus cyanipennis?? Say," Hentz's mss. 

 Catal.]. I cannot agree with you as to the specific name. The 

 third and fourth joints of antennae have no black spot as in B. 

 crepitans. The fourth at tip, and all the terminal joints are a 

 little darker than the three basal ones. The elytra are not of 

 a color '■'•plus bleue et plus claire^'' but, on the contrary, are 

 darker. The postpectus and abdomen, instead of being 

 ^''presque noirdtre,^' are almost testaceous. If there is no 

 mistake in labelling, I think you will find it does not agree with 

 Dejean's description. In that case, you ought to describe it as 

 new. Is it from Massachusetts or New Hampshire ? 



HARRIS TO HENTZ. 



Milton, Jan. 3, 1830. 



Your 220 has a close resemblance in the form of the head, 

 antennee and thorax to TelepJiorus. It is remarked by Latreille 

 (Gen. Crust, et Insect.) that the mandibles of Malthinus have 

 a strong tooth within the points — " mandibula intus dente uno 

 valido''^ ; this would justify me in placing this insect in the 

 genus Malilihius ; but I submit to your better judgment. May 

 not Cantliaris abbreviata and brevipennis belong to the same 

 genus as this insect ? 



