CERAMBYCID^; 275 



The larger head and prothorax, the latter more elongate and more 

 parallel, owing to the anterior inflation, impart to the type of thora- 

 cicus a very different appearance from any other of the numerous 

 examples of velutinus and acuticauda at hand, although this may 

 not be apparent from the description. 



Ophistomis Thorns. 

 Strangalia Lee. nee Serv. ; Strangalina Auriv. (pars). 



On comparing a typical Ophistomis from Brazil, fulvicornis Bates, 

 received from that author, with our North American series, I can 

 find no decided difference and conclude that our species should be 

 recorded under that name, rather than Strangalina Auriv., even 

 though the European type of the latter should be generically the 

 same as ours.* The hind tarsi are missing in the example of fulvi- 

 cornis referred to, but I have no doubt that the third joint is slender 

 and cylindric in form. This notably slender, cylindric, apically 

 feebly emarginate form of the third hind tarsal joint, distinguishes 

 our species from Leptura and Acmceops and serves also as one of the 

 characters separating them from Bellamira, where the third joint 

 is broad and truly bilobed, besides the biconstricted prothorax of 

 the latter genus. The minute fourth joint at the base of what is 

 really the fifth, is often very distinct. The antennal poriferous 

 depressions become somewhat more inconstant here than in Typo- 

 cerus, these being very deep and acutely defined in texana, very 

 shallow though evident in sexnotata and obsolete in the female of 

 montana and very minute in the male three species otherwise 

 evidently allied. Montana is not by any means a variety of 

 sexnotata, having pale incrassate antennae. The following are new 

 forms more or less recently received, which can be interpolated 

 readily in the table of LeConte (Sm. Misc. Coll., 264, p. 211;; 

 the first two are related to sexnotata Hald., but have pale antennae, 

 not, however, incrassate and compact distally as they are in 

 montana. 



*Some of the Mexican species figured by Bates, such as picticornis, belli, histrio, 

 lachrymans, felix and saltator, are faithful reproductions, in general habitus, of our 

 northern species of the usual virilis and luteicornis type, but others, such as nigrella, 

 f alveola and pallida, will necessitate at least another genus, the peculiarly attenuated, 

 laterally sinuate form of the elytra, not possessed by these latter species, being one 

 of the generic peculiarities of Ophistomis. 



