212 THE CANADIAN ENTOMOLOGIST 



impression, becoming gradually evanescent behind the middle. Metasternum 

 without mesocoxal line, epipleurai without raised line at base. 



Length 1.6 mm. 



Luling, Texas, three examples taken by the writer July 4-6, 1893. Two 

 of the three specimens are quite surely males, judging from the broad parallel- 

 sided prothorax; the third has the thorax equal in width to the elytra, but is 

 scarcely more narrowed in front than in the other two; it may be a female. 

 The type is a male. 



This minute species is obviously closely related to pusillus but the size is 

 conspicuously smaller, the base of the thorax is unmargined, and the male 

 shows no trace of the rnandibular lobe which is characteristic of pusillus. Horn 

 describes pusillus as having the mesocoxal line, but says it is indistinct. There 

 is absolutely no trace of the line in any one of my specimens. 



H. tnundulus, sp. nov. 



Pale flavo-testaceous throughout, elytra with a small, vague fuscous shade 

 behind the scutellum, the labrum also more or less infuscate; pubescence fine 

 short, concolorous, the marginal fringe inconspicuous; entire upper surface very 

 finely densely punctulate. Prothorax moderately transverse, equal in width 

 to the elytra (cf) or slightly wider (9), with the sides feebly arcuate and sub- 

 parallel, basal sinuation not distinctly margined. Elytra without stride. Body 

 beneath finely densely punctulate, metasternum often a little infuscate. Meso- 

 coxal line indistinct but usually traceable, no epipleural line; stridulating ridge 

 of first ventral segment complete. 



Length 2.6-2.9 mm. 



El Paso, Texas. Nov. 13, 1889. Twelve examples. 



This pallid little species together with the much larger H. pallidus were 

 seen in abundance on the wing just before sunset in the dry, sandy bed of the 

 Rio Grande on the above-mentioned date. It is only recently that I have dis- 

 covered the species to be a Littorimus. There is very little difference in the form 

 of the thorax in the specimens before me, and I feel somewhat uncertain as to 

 the sexes. In one or two the thorax and head seem slightly larger than the 

 rest, and it is probable that these are males. The metasternal intercoxal process 

 is barely as wide as the coxal width in this species, much narrower than in the 

 other species of Littorimus. 



H. moleculus, sp. nov. 

 Form oblong, obtuse at the extremities, as in auromicans; colour piceous, 

 sides and median line of prothorax obscure testaceous, elytra with irregular, 

 often interrupted pale fasciae of the usual type, which vary greatly in develop- 

 ment; pubescence very fine, short, yellowish and recurved on the elytra, darker 

 and erect on the prothorax, margin not fimbriate with ^onger hairs. Head and 

 thorax densely minutely punctulate, elytra with a dual punctuation consisting 

 of relatively coarse punctures separated by their own diameters on the average, 

 the interspaces very minutely punctulate. Prothorax nearly twice as wide as 

 long, as wide as the elytra in the female, just perceptibly wider in the male, 

 sides nearly parallel, feebly narrowed apically, sides of base a little oblique, and 

 very distinctly margined. Elytra not at all striate. Body beneath piceous, 

 legs, tip of prosternal lobe, pro- and epipleuhe and margins of ventral seg- 



