104 LENG AND HAMILTON. 



characters that would permit it to be attached at the end of a group 

 as a feebly differentiated cousin. The simple tibise, for though de- 

 scribed by Dr. LeConte as " feebly sulcate," they are really not at all 

 sulcate, place this insect in the subfamily Cerambycinje, there to con- 

 stitute a tribe related to Clytini. It may be noted that the affinity 

 of this tribe through Euderces towards the Lamiinse has already 

 been stated, vide " Classification" p. 303. 



The absence of the tibial sulci was pointed out by Dr. Horn several 

 years ago, and I believe that he also stated then the true position of 



the tribe. 



Tribe I. Dorcadiini. 



This tribe, represented by numerous species in the neighborhood 

 of the Mediterranean, has but two representatives in our fauna : 



Plectrura spiiiicauda Mann., 1852, Bull. }Iosc. ii, p. 366; Eschsch. Dej. 

 Cat. 3 ed. p. 373: producta Lee, 1854, Proc. Ac. Phil, vii, p. 19; LeConte, U. 

 S. Pacif. E. E. Ex. and Surveys xii, part ii, Entom. Eeport. 1857, p. 65, pi. 2, 

 fig. 15; Coleop. Alaska (Tr. Ara. Ent. Soc. xxi, 31). 

 Length 11-12 mm. ; .44-.48 inch. Habitat. — Sitka, Queen Charlotte Island, 

 Vancouver, Oregon, Washington. 

 Ipoclius fascialus Lee, 1852, Jour. Ac. Phil. ser. 2. ii, p. 167 ; subnitidns 

 Casey, 1891, Ann. N. Y. Ac. Sci. vi, p. 45 ; pubescens Casey, 1. c. 

 Length 7.5-4.5 mm. ; .30-. 18 inch. Habitat. — ^Southern California. 



The first is a brownish insect with rows of shining tubercles on tlie 

 elytra, which, at the apex, are prolonged into acute serrated cusps. 

 The sides of the prothorax are armed and serrate. Mr. C. J. Weidt 

 informs me that this species is frequently beaten from the crab apple. 



The second is a robust convex insect, sparsely clothed with long 

 erect hair ; the thorax, which is unarmed, bears two pairs of discal 

 pubescent spots ; the elytra have three transverse, pubescent fasciiB, 

 irregular in design and variable in extent, sometimes so broad as to 

 cover the posterior part of the elytra. The males are more slender 

 than the females. Gen. Casey states that this species occurs on the 

 blossoming branches of pine. From the range of variation observed 

 in a considerable number of specimens I am satisfied that the char- 

 acters on which this author ba.ses two new species are only individual. 

 Tribe II. Monilemini. 



Contains the genus Monilema only. Dr. Horn's synopsis (Trans. 

 Am. Ent. Soc. xii, pp. 182-184) is as follows: 



A. Scape of antennse submucronate inwards at tip; fli"st joint of hind tarsus as 

 long, or even longer than the next two and comparatively slender. 



Subgenus Ifloiiileina. 



]}. S(!ape of antennae simple: first .joint of hind tarsu.s not longer tlian the next 

 two and broad Subgenus Collaptoryx. 



