168 [September, 



MiCROLiPUS Lec. 



Antennae ll-articulatae, elongatae, eubserratae. Palpi maxillares, breves, 

 crassi, articulo 4to conico. Labrum quadratum, apice subrotundatum. Clj'peus 

 brevis, coriaceua. Tarsi antici articulis 4-subtu8 breviter lobatis. 



The body is elongate and linear, the head as broad as the thorax, very much 

 narrowed in front of the eyes, which are prominent ; the tip of the elytra is 

 eimple in both sexes ; the head of the male is slightly trifoveate ; the ventral 

 segments of the abdomen are entirely corneous. 



1. M. laticeps, elongatus, aeneo-niger, tenuissime cinereo-pubescens 

 clypeo flavo, thorace vix transverso, angulis rotundatis, margine tennui iSavo, 

 elytris vix rugoais, apice rotundatis anguste flavis. Long. '13. 



San Diego, California ; the palpi and antennae are black, the under part of 

 the three basal joints of the latter pale. The pale margin of the thorax is inter- 

 rupted at the apex in a specimen from San Francisco, which also has the thorax 

 a little narrowed behind, and the posterior angles less rounded than in the San 

 Diego specimens. It may perhaps be a different species, but a greater number 

 of specimens will be wanted to determine the question. 



Atelestds Er. 



1. A. basalis, opacus, sanguineus, brevissime pubescens, capite fusco, 

 thorace latitudine longiore, postice angustato basi producto et emarginato, 

 elytris depressis, thorace loagioribus, atris basi sanguineo-marginatis. 

 Long. 12. 



San Diego, California, under sea weeds. The red of the base of the elytra 

 extends on the outer margin almost to the middle. The male of this species, 

 as well as of both the following, has the 2d joint of the anterior tarsi obliquely 

 produced above (as in our species of Anthocomus) as far as the end of the 3rd 

 joint, which is aUo elongated. In this character it differs remarkably from 

 Erichson's Atelestus hemipterus, the male of which has the first joint of the 

 anterior tarsi produced obliquely under the second. According to Erichson's 

 principles of division, our species should form a separate genus, but as I have 

 been able, by this description, to find no difference except this sexual one, I do 

 not feel justified in giving a new generic name to the species here described. 



2. A. abdominalis, sanguineus, opacus, brevissime pubescens, thorace 

 latitudine longiore, postice angustato, basi producto vix emarginato, elytris 

 depressis, thorace longioribus, atris, abdomine toto atro. Long. -12, 



San Diego, with the preceding; the scutellum is red, but the elytra are 

 immaculate. 



3 A. collaris, niger, opacus, brevissime pubescens, thorace latitudine 

 vix breviore, rotundato, sanguineo basi medio late emarginato, elytris thorace 

 brevioribus, scabris. Long. -12. 



San Francisco ? One male sent by Mr. Pease. In the two preceding species 

 the elytra are gradually widened from the base, and lie together at the suture 

 for the greater part of their length. In this species they are not widened on 

 the sides, and commence to separate immediately behind the scutellum, which 

 is black. 



Div. 2. Dasytini. 



Dasytes Fabr. 



Although differing much in the form of the body, there appears to be no natu- 

 ral mode of separating the following species into genera; the two last species, 

 which are the only oues from the eastern part of the continent, do recede 

 remarkably from the others in the absence of the appendages between the claws 

 of the tarsi. There are however European species similar to them, which are 

 retained by Redtenbacher, in the genus Dasytes. We have not in North Ame- 

 rica the intermediate forms having one claw simple and the other with an 



